Spring is a season of renewal and change. For brown bears especially, it is a time of metabolic, physiologic, and familial transitions. I explain why in my latest blog post on explore.org. Check it out at https://blog.explore.org/brown-bears-spring-emergence/.
bears
Of Bears and Bicycles
Sometimes bears like to use roads as much as people, giving new meaning to the “share the road” concept.
While enjoying a quiet bicycle ride on a remote road you surprise a large animal in the brush. A split second later, you realize the seriousness of the situation, because you didn’t surprise just any animal. You surprised a bear. Would you be prepared to respond appropriately? What can cyclists do to reduce risky bear encounters?
Some of North America’s most amazing cycling destinations are located in bear country—Alaska, the Rocky Mountains, the Appalachians, Cascades, and Sierra Nevada, and the Great Lakes region. I’ve lived, worked, and cycled extensively in bear country and I love it. I’ve commuted by bicycle at Yellowstone National Park. I’ve toured in the Appalachians, Rockies, and Cascades where bears are frequently seen. When I worked at Katmai National Park, Alaska, I had hundreds of encounters with brown bears, and I frequently saw them while riding the park’s Valley of Ten Thousand Smokes road. Each experience taught me to fear bears less and respect them more. Cyclists can safely enjoy riding in bear country, but there is risk involved. However, the risk is manageable with the right knowledge, prevention, and preparation.
Cyclists need to be prepared for bear encounters. I found this bear walking toward me while I pedaled the Valley of Ten Thousand Smokes road.
Cycling in bear country creates two main issues. First, bicycles are usually quiet and often travel at high speed increasing the possibility of surprising bears. Secondly, many touring cyclists prefer to camp, and while camping isn’t the problem, if you’re camping in bear country then the good campsite you found is often located in good bear habitat.
Warning noise is one of the easiest precautions to take in bear country. Given enough notice, many bears will avoid people. Noise is not a safety net though, just a preventative measure so you don’t surprise a bear. It must be made appropriately and for the right reasons. It’s especially useful in areas where visibility is limited, and it’s easy too. Use your voice or a loud bike bell. Those cheap bear bells may save your vocal chords for campfire songs later in the evening, but they aren’t nearly loud enough in most situations to adequately warn bears. More importantly, bears may not identify any bell’s sound with people. You need to make noise to warn bears of your approach and identify yourself as human. No bell is as effective as the human voice. It’s no fun to shout all day, nor is it an action that fits well in all settings, so vary the amount of warning noise as necessary.
If you need an excuse to slow down during a ride, bears can be it. Excessive speed was one of the main factors that led to a fatal mauling of a mountain biker in Montana. Ride cautiously where bears are frequently seen, avoid biking during hours when bears are less likely to expect encounters with people, and pay attention to your surroundings. On the Valley of Ten Thousand Smokes road, a road that averages less than five vehicle trips a day in summer, I’m forced to ride slowly because too many bears use it to allow for a purely fitness ride. This is torturous for certain cyclists, myself included on occasion, but bears necessitate it. If I want to ride responsibly here, I must slow down.
Take the time to assess the terrain. Are you approaching the crest of a hill, a sharp bend, or is the road carved through thick brush? Will you be traveling through areas with food sources, like berries or salmon, that attract bears? This may seem like a mental burden that will cause a headache by the end of the day, but cyclists practice this risk assessment all of the time. While riding in traffic we identify and respond to unsafe situations routinely. Bears pose different challenges than cars, I realize, but trust your instincts. Slow down and give yourself time to use them.
This bear in Katmai was intent on using the road. To safely avoid a stressful encounter with him I stopped, picked my bike up, carried it off of the road and well into the forest to let the bear pass. Had I been traveling too fast, I would have risked surprising the bear at a very close range.
I let this black bear in North Cascades National Park know I was human by talking in a normal tone of voice. Once the bear realized I was human, he walked calmly into the forest.
Statistically speaking, groups of four or more people are very safe in bear country. So if the thought of encountering a bear alone is too intimidating, then join a group ride and stay close together. Group size is not effective if the group is spread so far apart that a bear only recognizes individual persons. Groups tend to be noisier and have lots of eyes to spot wildlife. Plus, during a bear encounter, a mass of humanity is intimidating to even the biggest bear.
With that being said, what should you do during a close encounter? Things can get complicated quickly and adrenaline will certainly rush, so prepare yourself mentally before you leave home. The key, according to Tammy Olson, a former wildlife biologist for Katmai National Park, “is to not behave in ways that are likely to be perceived as threatening when responding to a [defensive] bear at close range.”
How close is too close? The answer depends on a variety of factors (the presence of cubs, the vicinity of food like animal carcasses, the bear’s human-habituation level and disposition, surprise, and more). There are general recommendations to follow, but each bear is an individual and each situation is unique. A Yellowstone grizzly shouldn’t be treated like a Pennsylvania black bear. Talk with local officials about the general patterns of bear use and behavior in the area you plan on traveling through. Some areas, especially national parks, have regulations that define the minimum, legal distance to keep between yourself and a bear (50 yards at Katmai, 100 yards at Yellowstone, and 300 yards at Denali). These can be a useful, but not absolute, starting point to determine if you are too close. As a general rule, if you are altering the bear’s behavior, then you are too close.
Any time you find yourself in close quarters with a bear, stop riding and take a few seconds to assess the situation. Position your bicycle between you and the bear. As well as possibly adding a modicum of physical protection, the bike makes you look larger in a non-threatening way. Size matters in the bear world. This is why groups of people are generally safer in bear encounters than a lone person.
If you surprise a bear while bicycling, quickly assess the situation. What is the bear doing? Is it resting, feeding, approaching you, or showing signs of stress? Do you see or hear cubs? Is the bear vocalizing? Were you charged? Your behavior in these situations goes beyond the scope of this post, but what you see, hear, or think the bear is doing will influence your decision on how to react. (Please see the references at the end of the post for more information on bear behavior, identification, how to differentiate between defensive and predatory encounters, and the recommended responses.)
When you’re on a bike, you’re moving swiftly and you have less time to react than someone who is walking. This is more likely to provoke a charge from defensive bears, especially grizzly bears. If a bear charges you in a defensive, non-predatory situation, it is usually a bluff. Even so, this is a frightening experience. Hold your ground. Running or pedaling away may trigger the bear to chase you, and you can’t outrun a bear. Keep your bicycle with you if possible. Abandoning the bike, especially if there’s food in your panniers, can teach bears to approach people for another food reward.
Yelling at a defensive bear may provoke it further. Instead, talk to the bear calmly and back away slowly until the bear resumes its normal behavior (resting, feeding, traveling). Contact is rare, so only play dead if a bear makes physical contact with you. If it does, lie face down and cover your head and neck with your hands and arms. Remain still and quiet until the bear leaves the area. (Black bears attacks are very rare, but are much more likely to be predatory, so most bear behavior experts recommend you fight back if a black bear attacks.)
Sometimes you may see a bear before it is aware of you. If this happens, move away quietly the way you came and give the animal the room it needs. Find an appropriate place to observe it, where possible, and enjoy the moment. It’ll certainly be one you won’t forget.
Your goal should be to prevent close encounters. This is just as important when camping as it is when riding. At the end of a long day of bicycle touring, is there anything more satisfying than a beautiful campsite with a hot meal? Maybe not, but before you commit yourself to that wonderful campsite, take a few moments and search for signs of previous bear activity. Is there garbage scattered about from previous campers? Is the campsite near natural food sources that attract bears? Do you see fresh bear scat with human food or garbage in it? If so, consider moving on. You don’t want to risk a food conditioned bear coming into your camp at night.
Look for signs of bears like scat, tracks, and marking trees when you choose a campsite. Move on if the area seems to be frequently used by bears. The bear fur on this marking tree indicates plenty of bruins use the Valley of Ten Thousand Smokes road.
Most problems with bears while camping can be avoided if bears aren’t attracted to your campsite in the first place. Outside of developed campgrounds, cook and eat well away from your sleeping area (at least 100 yards). This is a Leave No Trace principle everyone should follow, but it also disperses food odors away from your sleeping area.
Consider where and how you plan on preparing your food in the backcountry. Are hot meals important, or would cold dinners and snacks suffice? Eating cold meals and eliminating the need to cook is one easy way to substantially reduce food odors around your camp. There is less to clean and less garbage at the end of the day. If you choose to cook then consider meals that require little field preparation. Touring cyclists don’t normally carry and cook perishable, odorous items like bacon, but anything strongly scented or should be avoided.
Before you leave home, decide how you will store your food and other odorous items like soap and toothpaste. Bear resistant containers (BRCs) are the best and most portable way to keep bears from your food, and in some areas they are required. BRCs lack creases or hinges that allow bears to open them. Yes, they are heavy and bulky, but their effectiveness has been proven repeatedly and backpacking-style BRCs normally fit into a large, rear pannier. The most common alternative, hanging food in a tree, is time consuming and risky. Some bears, especially in the Sierra Nevada, have learned to ignore BRCs but specialize in stealing food hung in trees. Occasionally, developed campgrounds in high bear use areas provide food storage facilities as an alternative to BRCs, but many do not.
Lastly, some people prefer to carry a bear deterrent like bear spray (not self defense spray) or firearms. Neither firearms nor bear spray are 100% effective against bears. I carry bear spray since it is non-lethal, non-toxic, and easy to use. It is intended only for close encounters (generally 30 feet or less) on aggressive or attacking bears. This stuff is potent too, so be careful. I know enough people who have accidentally discharged their bear spray to know you don’t want it in your face or in your pants, as one unfortunate individual at Brooks Camp discovered. Wherever you choose to keep it, bear spray needs to be quickly accessible. When necessary, I carry bear spray in my bike’s handlebar bag. (Thankfully, I’ve never had to use mine.)
There are many bear deterrents, but the greatest of all is your brain. No matter what you do in bear country, where you ride, or what you see, there is no substitute for common sense. We empower ourselves with safe cycling practices in traffic, and we can do the same around bears. The scenario at the beginning of the article isn’t fiction. It happened to me, and it’ll probably happen again. Traveling in bear habitat requires responsibility. Sloppy habits and dirty campsites can endanger future visitors and the lives of bears.
I always look forward to bicycling in bear country, which is some of the most scenic and inspiring land imaginable. Knowledge of and respect for these animals can turn what would be a dangerous and fearful encounter into the highlight of the trip. Given the opportunity, humans, bears, and even bicycles can coexist.
More Bear Safety Information
You can never know too much about bears, but an action appropriate in one region may not be appropriate in another. Talk to local officials about what works and is expected in their area. There is also plenty of contradictory information available about bear safety available online. The information provided in the resources below generally follows the consensus of leading bear biologists and public land managers. Besides learning behavioral techniques that may keep you safe and give you peace of mind, learning about bears and their ecology is fascinating and can open up a world of wonder into their complex lives.
Websites:
Interagency Grizzly Bear Committee: The IGBC was established in 1983 to help ensure recovery of viable grizzly bear populations and their habitat in the Lower 48 states.
Leave No Trace: The seven guiding principles of LNT ethics not only reduce our impact on the outdoors, but also correlate to the best camping practices in bear country.
Yellowstone National Park Bear Safety Pages: These may be the most comprehensive bear safety pages on the web.
Get Bear Smart Society: This organization is dedicated to reducing conflicts between bears and people.
Literature:
Bear Attacks: Their Cause and Avoidance by Stephen Herrero: This is not your typical bear attack book. It written by a wildlife biologist who has statistically analyzed bear attacks across North America. It offers scientifically supported advice for travelers in bear country.
Backcountry Bear Basics: The Definitive Guide to Avoiding Unpleasant Encounters by Dave Smith: Although less academic than Bear Attacks, this is another readable, common sense look at bear identification, behavior, avoidance, safety, and it includes a brief section on mountain biking.
DVD:
Staying Safe in Bear Country: If there was just one resource you could choose to educate yourself on how to behave around grizzly and black bears, this video is near the top of the list. In a no-nonsense fashion, it clearly and accurately explains bear behavior and how people can minimize the chance of bear encounters and attacks. It also provides insightful footage of bear behavior that may be hard to visualize. A transcript is available too.
Stehekin Grizzly Bear Meeting
On Feb. 28, I attended an informational meeting about the draft plan to restore grizzly bears into the North Cascades ecosystem. I believe animals and ecosystems should receive more protection and I’m largely in favor of the plan to restore grizzlies here, but I listened through the whole meeting, not speaking a word. This wasn’t a forum for debate. I wanted to hear to the perspectives of other people who think differently. There are times when it’s more insightful to listen than to speak.
I took copious notes, trying to capture the essence of what was said. Below are a few paraphrased questions and comments from local Stehekin residents. I know who made each comment, but I won’t divulge their identities. I’m sure they’d share the same opinions with anyone who asked, but the meeting was not a formal public open house where people could provide testimony that would be entered into the official record, and as such they probably didn’t expect anyone to broadcast their name and comments all over the internet.
Many of the first few questions were about bear biology and the practicalities of restoration. How did you determine 200 bears (the number of animals the plan aims to restore)? What happens if Alternative C doesn’t work? What is prime grizzly habitat? What’s the typical grizzly bear territory? Will the habitat still be suitable for these bears if the climate changes?
A viable population of grizzly bears may soon roam the North Cascades ecosystem. Not everyone favors the idea.
Then the comments and questions drifted into more contentious territory. Grizzly bears and endangered species are words that provoke strong emotions. Worry, loss, skepticism, and suspicion were many of the emotions local residents expressed. Bears could potentially bring more unwanted government regulation. Residents, understandably, expressed concerns about safety and loss of access to land. Few who spoke at the meeting seemed to believe the active restoration of bears is desirable.
Residents wondered about bear attacks and the effectiveness of bear spray. One person even read a lengthy description of a bear attack from this Facebook post. He also asked whether bears would inhibit the reopening of the upper Stehekin Valley Road, which has been a long standing issue for some local residents. The same person who read the bear attack description also expressed the opinion that humans are part of nature and the extirpation of grizzly bears across most of their former range in the Lower 48 was natural and okay.
A couple of people seemed to question the historical presence of grizzly bears in the ecosystem, a conclusion that surprised me, since the historical and archeological record confirms grizzlies were here. One person suggested that native tribes didn’t settle permanently because the mountainous terrain was rough and grizzlies could’ve been one of the factors.
To their credit, the representatives for North Cascades National Park Service Complex and the U.S. Fish and Wildlife Service avoided debating any point. That would’ve been inappropriate given the context of the meeting. They did explain, however, that these lands are federal and must be managed in the national interest. Local interests, therefore, are not necessarily the most important. They also explained how this population of bears could be designated as experimental under section 10(j) of Endangered Species Act. 10(j) status would allow more flexible management of the restored grizzly population compared to a population listed strictly as threatened and endangered.
Many of the concerns boil down to a difference in worldview from my own. Many people believe bears don’t need more space, especially if their space comes at the cost to people. They exist in healthy numbers throughout much of British Columbia and Alaska. Additionally, grizzly bears are not needed in North Cascades to fulfill a missing ecosystem function. Why make the effort to restore bears?
I wrote this post not to criticize, debate, or debunk any point. I wrote it because if you’re like me, you often do not have the opportunity to hear opposing perspectives concerning wildlife conservation issues. Those of us who think wildlife and wildlife habitat should be given greater levels of protection need to carefully consider the wants and needs of other people. Sure, I can read or listen to so-called balanced news articles about the grizzly bear restoration plan, but that’s not the same as listening to your neighbors, many of whom may feel very differently about the issue.
You can comment on the draft North Cascades grizzly bear restoration plan through March 14, 2017.
A January Bear
It was late January, but I enjoyed nearly perfect hiking weather in Big Bend National Park. The sky was clear, the wind was calm, and the temperatures hovered in the hiking Goldilocks range (for me, that’s the low 60˚s F). I had spotted a few piles of bear scat earlier that day, but all were dry and desiccated. Then in the late afternoon, I found one particularly fresh pile of crap.
This scat was soft and pliable and hadn’t been exposed to the dry desert air for very long. (I poked it with a stick to gain a very scientific measure of its age.) Was there a bear nearby? I hoped to find out.
The previous day, I stopped in the Chisos Basin Visitor Center to purchase a book to help me search for the park’s endemic oaks. A map on the visitor center wall was marked with sticky notes identifying when and where people had spotted black bears. At least a dozen had been seen over the past two weeks. I made a mental note to watch carefully for bear sign. Maybe, just maybe, I would be lucky enough to see one for myself.
The pinyon-oak-juniper habitat near Emory Peak (center) is preferred habitat for Big Bend’s black bears.
Although I spent considerable time searching for the endemic oaks (and found at least a couple, plus some species rarely found in the U.S.), bears were never far from my mind. Backcountry campsites all had bear-resistant food storage boxes, and signs clearly informed people that bears will take your unattended pack.
Occasionally, I’d find old piles of bear scat or a marking tree.
Black bears used this Arizona cypress (Hesperocyparis arizonica) near Boot Spring as a marking tree.
No long after I photographed the marking tree, I stumbled on the aforementioned scat. Its freshness caught my attention, but it wasn’t steaming so I couldn’t be sure if a bear was close or not. I only knew it was there earlier in the day. As I proceeded up the trail, motivated to pick up my pace and return to the campground before dark, two hikers traveling in the opposite direction told me they had just seen a bear not far from the trail. This was their first wild black bear sighting, and they spoke excitedly about their experience. I thanked them for the info and continued on, now even more alert.
The hikers said the bear was near a switchback in the trail, not far from a backcountry campsite. I slowed my pace as I approached that location, not wanting to startle the animal. A moment later, through some thick vegetation, I heard cracking branches and there it was—a black bear.
My soon-to-be award winning wildlife photo of a black bear in Big Bend National Park. Move over Tom Mangelsen.
What would a bear be doing out in January? Since bears are omnivorous and eat a wide variety of food, their scat reveals a world of information about where they’ve been and what they’ve been up to. The fresh bear scat I found 10 minutes before, like the older scat on the trails, was filled with fragments of pinyon nuts and shells. Pine nuts are exceptionally nutritious, containing almost 700 calories per 100 grams. The pinyons pines in the Chisos Mountains seemed to have produced a sizable cone crop in 2016, one which helped sustain the bears into mid winter.
Pinyon pine nut shells and fragments fill this fresh pile of bear scat. I found this scat just moments before seeing an active bear.
The density of the shrubs made it difficult for me to se exactly what the actual bear was doing, but it appeared to have its nose to the ground and it wasn’t moving far. Perhaps it was still feeding on pine nuts.
These Mexican pinyon pine (Pinus cembroides) cones still hold their fatty nuts.
Black bears in the Chisos Mountains rely heavily on habitats with pinyon, oak, juniper, and grassy talus slopes, although male bears will make more frequent use of low elevation areas. Even so, this was January 26. Shouldn’t the bear be inside a den?
Black bears in more northernly locations hibernate well before January. However, bears in Big Bend don’t typically enter their dens until late January or February, and when they do many don’t seem to fully enter hibernation. Male bears, especially, are more likely to remain active. Pregnant females in Big Bend, like other bear populations in North America, have the longest average denning period, beginning in mid to late December and ending in late April.
This winter activity isn’t unique to Big Bend’s bears. Black bears in Florida have similar winter dormancy patterns. Mild weather and the prospect of food, especially, can keep bears active for longer time spans. After all, bears are avoiding winter famine more than winter weather when they hibernate. The bear I saw probably wasn’t doing anything abnormal for a Big Bend black bear. It was just another bear doing bear things like eating and shitting in the woods.
Brooks River Bears Need Your Help
402’s spring cubs rest near the Lower River Platform at Brooks River on October 24, 2013.
Addendum: Please read the response to this issue by Katmai’s Superintendent, Mark Sturm.
In 2017, an elevated bridge and boardwalk will be constructed at Brooks River. In this post, you’ll find a letter that asks Katmai National Park to further restrict the timing of staging and construction for the bridge. My reasoning is outlined in the letter. I wrote it because I believe no staging or work on the project should happen from late June to late July or September and October. Brooks River’s bears, especially those who are not habituated to people, need complete access to the lower river area in the fall. That is their last chance to gain weight before hibernation. The current work schedule allows staging and work to begin when bears need Brooks River most. This is not acceptable.
You are welcome to use the letter to contact the park. You can use it as is, or personalize it as you see fit. You can copy the letter’s text below or download the rich text file which can be used with almost all word processing software.
Before you contact Katmai with your thoughts, please consider the following…
- The construction dates for the bridge project are in a federal contract which has already been awarded. If the dates can be modified it won’t be a simple process since it’s currently a contractual obligation. Don’t expect any change, if it comes, to be quick.
- Form letters are easy to respond to, because the recipient only needs to write one response. Personalized messages often require more in-depth responses.
- Phone calls can be more effective than written correspondence.
- Be polite and respectful when you contact the park. The people who manage Katmai are intelligent and well-meaning. They do not deserve insults or personal attacks.
You can contact the park in several ways.
- Snail Mail: Katmai National Park and Preserve, Attn: Superintendent, PO Box 7, King Salmon, AK, 99613
- Email: Write the park through its website.
- Phone: (907)246-3305
And now the letter:
Superintendent Sturm,
As you know, an elevated bridge and boardwalk will be constructed at Brooks River in 2017. The summary of work outlined in the project’s construction specifications generally restricts work and staging of equipment and supplies outside of July. Yet, it places minimal restrictions on staging and construction in late summer and fall. This will have serious impacts on bears who need full access to the river in September and October. I urge you to reconsider the construction schedule and modify the current contract to minimize the project’s impact on bears.
The construction schedule allows work in the river corridor to commence as soon as October 1. Work hours outlined in the construction specifications also permits staging on the spit at the mouth of Brooks River anytime after August 1. These activities can potentially displace many bears from the lower river, especially those who are not human-habituated.
Dozens of brown bears gather at Brooks River throughout September and October. The fall feeding period is especially critical, since bears are hyperphagic and need access to Brooks River’s abundant salmon. The river mouth provides salmon catch rates far higher than other areas of the river. Additionally, many bears who use the river in the fall are not habituated to people or vehicles. Habitat use by these bears is already restricted by the presence of people. Staging and construction in the fall will further displace these animals. Impacts to wildlife and the visitor experience from staging and construction of the bridge is of short duration, but can potentially be serious for individual bears who need to utilize the river. Bears that feed at Brooks River may do so because they know of no other or better place. For them, salmon in Brooks River ensures their yearly survival.
I understand that water levels in Naknek Lake provide a narrow window to transport materials and supplies to Brooks River, and often this can only occur in mid to late summer. However, this does not justify displacing bears from the food resources they need to survive, even for one season. Brooks River is a world famous bear viewing area. In FY16, the bearcams received 40 million hits. Brooks River’s wildlife deserves the highest level of protection possible. To do this, I urge you to place further restrictions on the construction schedule for the elevated bridge at Brooks River. Staging should only occur outside of July and September-October. Construction and clearing work in the river corridor should begin no sooner than November 1.
I look forward to your response and thank you for your time.
Addendum: Please read the response to this issue by Katmai’s Superintendent, Mark Sturm.
Bears Have Long Memories
Bear cubs are apt to reflect mom’s mood. When she’s relaxed, they are relaxed. When mom is alert and stressed, her cubs are on edge. Cubs also take a keen interest in anything that their mother investigates. In this way, they learn much about what to eat, where to find food, and many other survival skills. In this way, mother bears are teachers. However, mother bears may teach their cubs behaviors that lead to conflict with humans.
In a study recently published in the journal PLOS One, researchers from the University of Alberta found that behavior that leads to conflict with humans is not genetic. It is learned. Bears who were raised by mothers with a documented pattern of conflict with humans were more likely to be involved in conflict with humans as adult bears. The study identified 213 bears (118 males and 95 females) through DNA extracted from hair samples, then examined behavioral patterns in both father-offspring and mother-offspring relationships. The researchers concluded over 60% of offspring from “problem mothers” were likely to be “problem bears.”* In contrast, only 29% of bears from “problem fathers” were identified in bear-human conflicts. This was very similar to the percent of bears (30%) involved in bear-human conflict raised by mothers with no history of conflict with people. Since male bears have no role in raising cubs, the evidence in the study suggests that behavior leading to conflict with people is learned, not inherited through genes.
Behavior of offspring was not related to the behavior of the father bear. http://dx.doi.org/10.1371/journal.pone.0165425.g002
Bears raised by mothers with a history of bear-human conflict have a higher likelihood of conflict with people. http://dx.doi.org/10.1371/journal.pone.0165425.g002
If you watch Katmai’s bearcams, you may be familiar with the escapades of 273 and her cub. These bears are famous for their curious and playful nature. Over the past two summers, they were prone to investigate almost anything that caught their attention. In 2015, they damaged buildings at Brooks Camp which prompted rangers to escalate their hazing techniques to deter them.
This building was damaged by 273 and cub in August 2015. I helped to erect the electric fence as a temporary deterrent to further damage.
They repeatedly damaged a sign near the bridge over Brooks River.
They caused wildlife technicians to photo-bomb a live chat on archeology.
They even played with unattended construction equipment.
I took the video of 273 and her cub with the construction equipment from inside a cabin last summer. Clearly, this family has demonstrated an interest in human objects and equipment. They are also relatively habituated to the presence of people. Since 273 has exposed her cub to people and buildings, does this increase the likelihood that the cub will repeat those behaviors when he becomes an independent bear? All signs point to yes.
I’ve long suspected that bears raised by highly human-habituated mothers are more likely to demonstrate high levels of habituation toward humans when they are adults. I’ve also suspected the same with bear-human conflict. If mom teaches her cubs to investigate human equipment or seek out human food, then the cubs are going to remember those experiences when they become independent bears. The study from Alberta provides some evidence to support my suspicions.
Does this mean that 273’s cub is destined to damage property at Brooks Camp? Not necessarily as long as rangers, lodge staff, and visitors at Brooks Camp are vigilant and actively work to eliminate conflict between bears and people. (Access to lots of natural food is extremely important too.)
Mother bears are teachers and cubs are students, but not everything cubs learn from mothers is advantageous in a world where habitat is increasingly crowded with people. Mother bears teach their cubs many survival skills, some of which can lead to conflict with humans. We can’t change the way bears live, nor should we. The onus is on us to act in ways that allow bears space to live and survive without learning behaviors that lead to conflict.
——-
*I discourage the use of “problem bears” as a term to describe bears involved in bear-human conflict. The term was used in the study, but this label stigmatizes bears in negative, anthropomorphic ways. These bears are only exploiting opportunities presented to them. The problem isn’t the bear. The problem is the temptations for conflict provided or caused by people.
Today’s post is courtesy of explore.org
Where do Brooks River’s brown bears go to hibernate? Find out what we know in my latest on explore.org’s blog: http://blog.explore.org/brown-bear-where-have-you-gone/.
Brown Bear Fatness Index
Brown bears get fat, often really fat. They also lose a lot of weight and sometimes become really skinny. They are often fat and skinny in the same year. When you watch brown bears, either in person or via bearcam, you can sometimes make a fairly accurate determination of a bear’s body fat and relative health by looking at its shape.
Fatness can be used as an indicator of health in brown bears. Brown bears need to eat a year’s worth of food in six months or less to survive, and body fat is the key their survival. They can lose 30% or more of their body weight during hibernation and can continue to lose weight throughout the spring when few high calorie foods are available. In the Brooks River area, only after green plants begin to grow and salmon have arrived do most bears begin to regain lost weight and start to accumulate body fat.
While fat is important to bears, a thin bear isn’t necessarily an unhealthy bear. Young subadult bears and yearling cubs, for example, often appear thin in spring and early summer before many high calorie food sources are available. These bears usually regain lost body mass in summer and early fall.
Polar Bear International developed a handy scorecard to measure the relative fatness of polar bears. I’ve adapted it for brown bears. My brown bear fat index uses the same categories as the polar bear index, which ranges from skinny/emaciated to very fat/obese. I also included additional information for each category such as the age/sex class most likely to be in a category and the time of year bears are most likely to be in a category.
Please note, my brown bear index is subjective and based on my observations at Brooks River, Katmai National Park, Alaska. The polar bear fatness index is also subjective, but less so than mine because researchers who handle immobilized bears can palpate the animal to estimate its body fat content. (Katmai’s Changing Tides project also tracks body fat content in female brown bears, but uses bioelectric impedence analysis.)
Brown Bear Fatness Index
Emaciated: bear appears skinny with ribs, vertebrae, and hip bones usually clearly visible unless covered by fur.
- Time of year most likely to happen: late winter through early summer, but can happen in all seasons.
- Age/sex Class: Older bears, especially older mothers with newborn cubs and injured bears
16 Cinnamon shows an emaciated figure in July 2010. Notice his prominent hip bones and shoulder blades. If he had less fur, his ribs would also be noticeable.
In this photo, also from July 2010, Cinnamon’s vertebrae seem visible through his fur. Despite his lack of body fat in July, he survived winter and returned to Brooks in 2011. At the time, he was estimated to be at least in his late 20s, but could’ve been older.
Thin: vertebrae and hip bones partly visible; narrow body
- Time of year most likely to happen: late winter through early summer, but can happen in all seasons.
- Age/sex class: subadults, yearling cubs, 2.5 year-old cubs, older bears, and mothers with newborn cubs
234 Evander in July 2010 displays a thin body with noticeable hip bones. Evander was an older bear (probably older than 20 years) in 2010.
In this photo from early July 2016, 503 Cubadult appears thin with slightly visible hip bones. His narrow body shape is not uncommon for young subadult bears (he was 3.5 years old in July 2016), and does not necessarily indicate poor health. Rather it reflects the time of year and his low rank in the bear hierarchy.
Average: hip bones and ribs not visible; the bear’s body, neck, and head are evenly proportioned
- Time of year most likely to happen: all year, but most often summer
- Age/sex class: all ages
This adult female, 505, is well proportioned and a good representative of average fatness for an early to mid summer bear. Photo taken on July 8, 2016.
Fat: fat over rump, stomach hangs low; bear’s neck is semi-fat but doesn’t distort the size of the head
- Time of year most likely to happen: late summer and fall
- Age/sex class: adult males in prime of life in mid summer, all bears late summer and fall
Katmai’s brown bears most often reach the fat class in late summer and fall when salmon are readily accessible and have been so for two months or more. In this photo from September 2015, 89 Backpack displays the typical body shape of a fat bear. Most bears attain this body shape before they hibernate.
Sometimes large adult males, like 747, can reach the fat category by the end of July. Some bears aren’t this fat when the go into the den, yet 747 reached this size months before hibernation. This photo was taken in late July 2015.
Obese: stomach hangs very low; bear’s neck is very fat and makes head appear smaller in proportion to its body
- Time of year most likely to happen: very late summer and fall
- Age/sex class: adult males in prime of life and adult females without cubs
This NPS photo of 747 epitomizes an obese bear. (He should’ve won #FatBearWeek. Election was rigged!) Seriously, this is an extremely obese bear. I don’t think I’ve ever seen a bear this fat before. His belly hangs nearly to the ground (the water is not very deep where he stands in the photo). 747 is a very dominant adult male at Brooks Falls. As such, he has access to his choice of fishing spots. His well-endowed figure is proof of his dominance, health, and fishing skills.
409 Beadnose shows the ample proportions of an obese female in September 2015. Females with cubs do not usually attain this level of fatness because of the energetic costs associated with raising cubs. Beadnose did not have cubs in 2015.
The Best Thing You’ll Read About Bark Today (If You Don’t Read Anything Else about Bark)
This post is about bark.
I know what you’re thinking. “Bark—an enthralling topic!” I couldn’t agree more, but bark is often overlooked and ignored by most people. Yet bark records many events in a tree’s history.
Thin and smooth barked trees like quaking aspen (Populus tremuloides) are especially good at recording animal sign. Aspen is the most widely distributed native tree in North America. Its bark becomes thick and furrowed only on old trees, and usually only near the ground. Most of the time aspen bark is smooth, colored white to gray (even greenish on young trees) with dark chevrons where self-pruned branches fell to the ground.
Since aspen bark is thin-skinned, it’s easily scarred. Along hiking trails, you’ll commonly find names and initials carved into it. (Don’t do this. No one cares if you were there with your “true love,” who you probably dumped the week after, and it opens the tree to possible infection.) Aspen bark records more than human impulses though. In bear country, you can often find evidence of bears climbing the trees.
Black bears have five toes each equipped with claws superbly designed for climbing. Scars on trees from climbing bears usually come in sets of five.
Black bears are particularly adept at climbing trees. Their strength and relatively short, sharply curved claws help them gain purchase even on smooth barked trees like aspen. If I’m in an area where black bears live, I almost always look for bear claw marks on aspen. In the Stehekin Valley, bear claw marks are easily seen on aspen along the Stehekin River Trail and Agnes Gorge Trail.
The claw marks represent a moment in time. Under what circumstances were they made? Was a bear startled by a person? Another bear? Was it simply playing or exploring? Black bears are omnivorous, but I have read no records or seen any signs of them eating any part of aspen trees, so they probably weren’t climbing the tree for food. In the eastern U.S. though, black bears often climb another smooth barked tree, American beech (Fagus grandifolia), to feast on beechnuts.
The next time you find an aspen, take a closer look at its bark. Bark isn’t as static as its outward appearance suggests. You might find a story there.
Strut Your Stuff
In my last post, I broke down an interaction between two mother bears, one of whom was particularly defensive. Bears though don’t always charge and threaten violence to make their point. As this video illustrates, bears communicate through body language to establish dominance and avoid conflict. (Warning: Long Video.)
In the video, 747 is the heftier, darker bear. 68 is the tall, lanky bear. Both are mature adult males, likely in the prime of their lives. As I see it, bear 747 comes out of this on top as he asserts his dominance over the newcomer, 68. This took some time, however. 68 didn’t exactly yield like most would upon the approach of 747.
As the video starts, 747 (left) immediately approaches the newcomer on the island. 68 subtly skirts 747, but continues his approach toward the falls. You can see that 747 is much bulkier than the newcomer, but the new bear is just as tall, if not taller.
747 (left) approaches 68 on the island downstream of Brooks Falls.
When 747 turns his back on the new bear, 68 takes the opportunity to mark some grass (0:50). 68 is not acting submissive or yielding.
After a brief do-si-do, 68 (left) marks grass while 747 does the same.
The new bear approaches 747. 747 stands and watches. At this point, the outcome is very much undecided (1:12).
68 (left) approaches 747.
After a little more posturing, 747 turns to mark the willow on the island. This is a bold display of dominance in front of 68. The newcomer though continues to cowboy walk away from 747, still not submissive but very focused on 747’s movements (2:00).
747 marks a willow tree while 68 postures nearby.
747 follows the exact same route on the island as 68, probably following the newcomer’s scent and leaving his own on the way (2:20). 68 postures more in the grass. 747 again marks the tree. This time for almost 30 seconds (3:18).
747 says, “This is my turf.”
747 then goes to the grass where 68 just was and rubs it on his body. He seems to want to leave a scent trail everywhere his competitor has (4:05).
747 (center) marks the grass where 68 had just walked.
68 walks downriver. 747 follows. In the riffles, 747 catches up to him. Instead of fighting, the bears posture more. Here’s where 747 seems to assert his dominance more clearly. 68, instead of posturing further, stands in the riffles and watches 747 approach then walk away (5:00).
747 pursues 68 downstream.
The video cuts to a moment a few minutes later when 68 makes his way back to the island. This draws 747’s attention and he approaches 68 again. 747’s ears remain upright and forward, a sign of dominance in this context. The new bear’s ears are oriented back against his head, a sign of defensiveness (6:40).
747 (left) directly approaches 68 one last time. Note the bears’ ears. 747’s are pitched forward like he is not intimidated by 68.
747 circles 68. 747 walks away and the newcomer stands and watches, indicating that 747 successfully asserted his dominance in the interaction. 747 then goes back to the island and marks the vegetation again (7:05). 68 continues to stand and watch. Winner: 747.
747 is one of the largest and most dominant bears at Brooks River.
During encounters between adult male bears, the “winner” is the bear who ends the interaction, usually by walking away. This is exactly what 747 did. (Exceptions are when bears compete over a resource they want like food, a fishing spot, or access to a female. In those cases, the dominant bear stays where he wants, displacing the subordinate bear who usually moves away.)
Any time a new bear arrives at Brooks Falls, my interest piques. Newcomers are often wildcards. They may or may not know how to fish the falls and must weave their way into the river’s hierarchy. 68 was never identified at Brooks Falls in July. I didn’t recognize him when he arrived. He seemed to show some familiarity with the falls area and wasn’t particularly wary of other bears. When 747 saw the newcomer I thought, “This could get interesting.” It did, just in a non-violent way.
68 and 747 communicated their intentions clearly through posturing and marking vegetation. Throughout the entire video, these bears get very close to each other, but never make physical contact. Both want to hold high places in the hierarchy, because dominance confers many advantages. Through a continued, confident approach and more exaggerated posturing, 747 asserts his dominance over the newcomer. This is a classic, albeit lengthy, example of bears using body language to communicate their intentions, avoid physical conflict, and establish dominance.
For more information on Katmai’s bears, download the latest edition of Bears of Brooks River: A Guide to Their Identification, Lives, Identification, and Habits.
Wandering at Large 