All about Bears!

Carnivores

 

Wildlife Safari has 4 brown bears; Mak, Oso, Russell, and Claire. While all these bears are apart of the brown bear species, they are actually distinct subspecies; Mak and Oso are grizzly bears, where as Russell and Claire are Alaskan coastal brown bears. In total, there are 8 sub-species of brown bear and they are the most widely distributed of all bears species. They can be found in tundra, forests, mountain ranges, or coastlines depending on the subspecies. They range throughout North America and Northern Eurasia, including Russia, central Asia, China, Canada, the United States, and Scandinavia. Historically the grizzly’s bear range covered much of North America from the mid-plains westward to California and from central Mexico north throughout Alaska and Canada. However, currently, only 1% of grizzly bears original range in the contiguous United States remains. In fact, 95% of the brown bear population in the United States can be found in Alaska.

girls -carter

Russell and Claire during Party at Bear Island

 We also have 3 American black bears at the park, Takoda, Chochmo, and Donna. Unlike brown bears, black bears are only found in North America, and they are the continent’s smallest and most widely-distributed bear species. Currently, American black bears can be found throughout forested mountainous areas from the Appalachian Mountains in the east; to the Rocky Mountains, the Sierra Nevadas, and the Cascades to the west; south to Mexico; and all the way north throughout Canada and Alaska; and many places in between. Despite being named “brown bears” and “black bears,” color is never an indicator of either species. Both species can range from almost white, to blonde, to pure black, and many color phases in between depending on age, sex, and even the season. Even our black bears don’t look alike; Takoda is referred to as a Cinnamon black bear because he has a reddish-brown coat of fur, reminiscent of the spice–hence the name. Generally, black bears can be distinguished from brown bears by their smaller size, their less concave skull profiles, shorter claws, and the lack of a shoulder hump.

black bear in pool -carter

Chochmo: one of our North America black bears takes a swim!

Brown and black bears are omnivorous animals and will eat almost anything. In fact, brown bears are one of the most omnivorous animals in the world and have been recorded consuming the greatest variety of foods of any bear. However, both bears’ diets are extremely variable throughout the year and depend on the season, area, and on opportunity. The vast majority of their diet– as much as 80%!–consists of vegetation, such as roots, grasses, and fruits. At Wildlife Safari, apples are a favorite among our brown bears. Despite their large sizes, both bears will eat insects and grubs when they can get them. For example, brown bears in Yellowstone eat an enormous number of army cutworm moths during the summer, sometimes consuming as many as 40,000 moths in a single day! And they can get up to half of their annual caloric intake from these insects. When available, brown and black bears will also feast on spawning trout and salmon. Most bears don’t actively hunt, but will scavenge off dead animals or prey killed by other predators.

bur with ribcage -carter

Oso enjoying a section of ribcage

It is a common misconception that bears hibernate during winter. While bears do slow down their metabolism during the winter, they are not true hibernators. Black and brown bears go into a deep sleep during the winter months, known as torpor. During true hibernation, the animals will not wake up when they hear a loud noise or even if they are moved or touched. While in torpor, the animal can wake up quickly and easily. During true hibernation, the animal has a low body temperature, slow breathing and heart rate, and low metabolic rate. During the bear’s torpor, their breathing rate, heart rate, and metabolic rate are low, but their body temperature remains relatively high. Animals undergo torpor, or hibernation, as a way to to conserve energy, survive when food is scarce, and minimize their need to face the elements in the cold winter months. To prepare for hibernation, bears need to eat a lot during the fall to store up body fat. During the months before torpor, bears undergo hyperphagia and can eat up to 90 pounds of food every day, and put on up to 3 pounds of weight each day. Bears can weight twice as much before hibernation as it will in the spring. And but the time torpor is over, bears can lose 15-20% of their body weight.

sleepy bur -carter

Claire during the hibernating bear encounter (offered during winter months)

Mak, Oso, Claire, Russell, Takoda, Chcochmo, and Donna are intelligent, curious, charismatic, lovable animals–not just animals that deserve caution when hiking.

 

Advertisements

Mistaken Identity: Brown bear or black bear?

Carnivores, Uncategorized

How can you tell a black bear from a brown bear? Well, it may not be as easy as you think. In fact, both species of bears can range in color from deep black to blonde! Brown bears are typically larger than black bears, but again there is variation in size across subspecies. The best way to tell apart the two species of bear is to look at the anatomy of their shoulders and claws.

Brown bear

Brown bears are diggers, so they have powerful muscles between their shoulders forming a large, prominent hump. They also have 4-6 inch long curved claws that are dulled to help them forage and dig dens for hibernation.

Black bears, on the other hand, are climbers. They do not need the excessive shoulder muscle or long claws. They have shorter and sharper claws for climbing trees in which they use to forage above the forest floor, and will often hibernate up in the trees as well.

Black bear

Black bear

Rise and Shine!

Behind the Scenes, Carnivores, Uncategorized

Spring is here and the bears at Wildlife Safari have started venturing out and stretching their legs after a long four months of hibernation. Although still a little sleepy, the bears are looking happy and healthy, having lost a substantial amount of weight during their time of rest.

One of the black bears surrounded by snacks and enrichment

One of the black bears, Chochmo surrounded by snacks and enrichment – photo courtesy of Taylor Sherrow

When the bears first get up, they ease into eating again, starting on small amounts of simple foods and slowly increasing as summer approaches.

The black bears typically hibernate for longer than the brown bears, but are also starting to emerge for the spring.

Grizzly brothers, Mak and Oso, enjoying the spring sunshine - photo courtesy of Taylor Sherrow

Grizzly brothers, Mak and Oso, enjoying the spring sunshine – photo courtesy of Taylor Sherrow

Sunshine adventures

Little Boy on sunshine adventures – photo courtesy of Taylor Sherrow

In the wild, spring is the time when cubs are around, emerging from their dens with their mothers for the first time. Bears will give birth while hibernating, with cubs nursing on their snoozing mother through the winter. By the time spring rolls around, cubs are big enough to explore and play while their mothers find food.

This may seem like a good way to raise small young, and it is not just good timing that allows them to give birth during hibernation. Bears can actually delay implantation of fertilized eggs to make sure their pregnancy goes through these resting months. “Delayed implantation is a really cool feature of the bear reproductive cycle,” says Melissa Fox, primary bear trainer at Wildlife Safari. “Bears will typically mate in late spring, but the fertilized egg won’t attach to the uterine wall until fall, and only if the female has gained enough weight to sustain her – typically around 150lbs.” If the female does not gain that weight, the pregnancy will be terminated. This pregnancy will only last 2 months, giving the little cubs time to grow before the end of the hibernation period. Cubs are born tiny and hairless, though they are much bigger and stronger when they leave the den. “They are born early so they can switch to mammary nourishment (milk) sooner,” explains Fox. “It’s more energy efficient.”

Takoda the black bear saying hello to his keepers

Little Girl, the black bear saying hello to her keepers – photo courtesy of Melissa Fox

As their primary, Fox spends a lot of time with both the brown and black bears. “I love how intelligent and playful they are,” she says. “It makes them so much fun to work with.”

Once they are awake and ready to eat, bears are mostly foragers – eating whatever is around. While they do eat meat, they won’t generally hunt, preferring to eat prey that another animal has caught, although they will also fish.

The black bears love their ponds

The black bears love their ponds – photo courtesy of Taylor Sherrow

Bears 2

Photo courtesy of Melissa Fox

Big Bear encounters have started, so if you haven’t met our brown bears, now is the perfect time to come and see them!