Black Bears by Sarah Powell

sp871_1 — 2025-06-02 15:26:25 UTC

Black bears are primarily found in North America and prefer to live in heavily wooded areas like dense forests, so they are covered from the elements while traveling. They may also be found in mountains or swampy areas, but mainly where human presence is low. They seek out locations in valleys that are covered in trees, and find rock cavities, fallen trees or hollowed out logs for denning.

Structural: Tapetum Lucidium

sp871_1 — 2025-06-02 15:56:59 UTC

Black bears have a reflective layer in their eyes called the tapetum lucidum. It enhances their vision during low-light situations, making it easier to find food and navigate at night.

Structural: Strong Curved Claws

sp871_1 — 2025-06-03 15:30:56 UTC

Black bears have strong, curved claws that make it easier for them to rip through logs and climb trees to find food. It also allows them to dig and manipulate objects like rocks and branches for a variety of reasons, including forging, scratching/ marking territory, and leaving scent for communication.

Mix between behavioral and physiological: Torpor (Dormancy)

sp871_1 — 2025-06-03 15:37:56 UTC

During the winter, black bears enter Torpor. Torpor isn't a true hibernation, however, their body temperature still reduces, as well as their metabolic rate and their heart rate, to conserve energy to survive during the cold months.

Behavioral: Tree Climbing for Deffence

sp871_1 — 2025-06-03 15:45:17 UTC

Black bears are skilled climbers due to their claws. Rather than engaging in a fight, black bears are more likely to retreat up a tree. This is another reason why bears prefer to inhabit forested areas.

Physiological: Longer Digestive Tract

sp871_1 — 2025-06-03 15:49:15 UTC

Bears have a longer digestive tract than other omnivores. It helps extract more nutrients from their highly varied diet and maximize the quality of their food items.