Bears

Bears at a glance

Need to know

• Polar bears are the largest terrestrial carnivores on Earth.
• Giant pandas are almost entirely herbivorous, eating primarily bamboo.
• The South American spectacled bear is the only bear native to South America.
• Brown bears display a wide variety of color morphs, from nearly white to dark brown.
• Most bears are solitary, but mothers are highly protective of cubs.
• Bears can run up to 48 km/h despite their bulky appearance.

About the Bears

Bears are large, powerfully built mammals of the family Ursidae, found in diverse habitats across the Northern Hemisphere and parts of South America. With only eight living species, bears range from the arctic-adapted polar bear to the famously bamboo-loving giant panda and the widespread brown and black bears. Each species is uniquely adapted to its habitat, diet, and climate. Most bears are solitary for much of their lives, though they show complex social behaviors, especially between mothers and cubs. Because of their size, ecological impact, and cultural significance, bears are among the most studied and protected wildlife worldwide.

Physical characteristics

Size: 1.2 to 3 m long (varies by species). Weight: 60 kg to 800 kg (varies by species). Lifespan: Typically 20–30 years in the wild, up to 40 in captivity.

• Sturdy, massive bodies
• Short tails
• Non-retractile, curved claws
• Prominent skulls with strong jaws
• Highly variable fur coloration, depending on species and region

Notable species

• Brown Bear (Ursus arctos) — Least Concern. Forests, mountains, tundra, and coastal regions Regions: Alaska, Canada, Russia, Scandinavia, Central Asia, Carpathians, Japan.
• American Black Bear (Ursus americanus) — Least Concern. Forests, swamps, mountains Regions: Canada, United States, Mexico, Alaska, Appalachian Mountains, Rocky Mountains.
• Polar Bear (Ursus maritimus) — Vulnerable. Sea ice, coastal arctic zones Regions: Arctic Ocean, Beaufort Sea, Chukchi Sea, Barents Sea, Labrador Sea, Hudson Bay, Baffin Bay.
• Giant Panda (Ailuropoda melanoleuca) — Vulnerable. Montane bamboo forests Regions: Sichuan, Shaanxi, Gansu, Qinling Mountains, Minshan Mountains.
• Spectacled Bear (Tremarctos ornatus) — Vulnerable. Cloud forests, high-altitude grasslands Regions: Andes Mountains, Venezuela, Colombia, Ecuador, Peru, Bolivia.
• Asiatic Black Bear (Ursus thibetanus) — Vulnerable. Broadleaf and coniferous forests, hilly regions Regions: Himalayas, China, Korea, Japan, Southeast Asia, Far East Russia.

Habitat and range

Original range: Bears originated and evolved across Eurasia and North America.

Current distribution: Current distribution includes North America, South America (Andes), Europe, northern and eastern Asia, and the Arctic.

Preferred environments: Boreal and temperate forests, Tundra, Grasslands, Montane forests, Arctic ice, Cloud forests

Regions: North America, Alaska, Canada, United States, Mexico, Europe, Russia, Himalayas, China, Japan, Southeast Asia, Andes Mountains, Arctic Ocean and coastal Arctic

Where to see Bears

• Katmai National Park, Alaska — July–September. Watch brown bears feasting on salmon in rivers and at Brooks Falls.
• Churchill, Manitoba, Canada — October–November. View polar bears along the edge of Hudson Bay during migration.
• Sichuan, China — April–October. Wild giant pandas are rarely seen, but dedicated reserves provide opportunities.
• Machu Picchu Sanctuary, Peru — May–October. Spectacled bears occasionally sighted in cloud forests.

Behavior and diet

Diet: Omnivorous (most species), ranging from plants and berries to fish, small mammals, carrion, and insects. Polar bears are almost exclusively carnivorous (seals). Pandas are specialized bamboo eaters.

Social structure: Mostly solitary except for mothers with cubs, occasional feeding aggregations (e.g., salmon runs) or rare pairs.

Communication: Bears communicate through vocalizations (growls, huffs, roars), body postures, scent marking, and scratching trees.

• Hibernation in winter dens (brown/black bears; not polar or panda)
• Swimming long distances (notably polar and brown bears)
• Standing on hind legs to get a better view or smell
• Marking territory with scent and claw marks

Interactions with other animals

• Salmon (prey): Brown bears rely heavily on spawning salmon, especially in Alaska and Russia, as a food source during summer.
• Humans (competitive/potential threat): Humans compete for habitat, sometimes result in dangerous encounters or conservation conflicts.
• Ringed Seal (prey): Polar bears hunt ringed seals on sea ice, a critical food resource.
• Wolves (competitive): Bears and wolves occasionally compete for carrion or prey, especially in overlapping territories.

Conservation

IUCN Red List status: Range from Least Concern to Vulnerable (varies by species)

Threats

• Habitat loss and fragmentation
• Poaching and illegal trade
• Climate change (especially polar bears)
• Human-bear conflicts
• Decline of prey and food resources

Conservation efforts

• Protected reserves and national parks
• Anti-poaching patrols and trade regulation
• Habitat restoration projects
• Community education and coexistence programs
• International treaties (e.g., CITES, IUCN Red List monitoring)

How to help

• Support and promote bear conservation organizations
• Practice responsible ecotourism in bear habitats
• Reduce waste and attractants in known bear areas
• Advocate for protection of wild spaces and bear corridors
• Educate others about coexistence and the importance of bears in ecosystems

Bears facts for kids

Bears are big, strong mammals that live in forests, mountains, ice, and jungles all over the world. Each bear species is unique and loves different foods, like bamboo or fish. They are usually shy and prefer to live alone, except for baby bears who stay close to their mothers.

• Polar bears have black skin under their white fur to help stay warm.
• Pandas almost only eat bamboo, munching up to 14 hours a day!
• Bears can run faster than the fastest human sprinter.
• Some bears sleep all winter in a deep sleep called hibernation.
• Spectacled bears are named because of the lighter rings of fur around their eyes.

Did you know? Did you know some brown bears can weigh as much as a small car – up to 800 kilograms!

Watch & learn

• The Secret Life of Bears - BBC Earth Full Documentary — BBC Earth. This feature-length documentary explores the remarkable behaviors of bears across the world, from hunting strategies to raising cubs. High-definition footage and expert narration provide insights into the lives of Ursidae in various habitats.
• Grizzly Bears: The Ultimate Survivors — National Geographic Wild. Follow grizzly bears as they traverse the wilds of North America, showcasing their survival skills, feeding habits, and interactions with their environment. National Geographic's dramatic filming and storytelling make this a must-watch for bear enthusiasts.
• Inside the Bear’s World - Smithsonian Channel — Smithsonian Channel. Discover how bears adapt to their ecosystems, from the icy Arctic to North American forests. Unique camera angles offer close-up views of their foraging, fishing, and playful moments with cubs.
• Bears of the Last Frontier - PBS Nature — PBS Nature. Renowned naturalist Chris Morgan journeys across Alaska to study brown bears, black bears, and polar bears in this in-depth look at Ursidae in the American wilderness. The series blends ecological education with spectacular wildlife encounters.
• Polar Bears: Ice Masters of the Arctic — BBC Earth. Experience the harsh world of polar bears as BBC Earth cameras capture their lives on Arctic ice. This documentary reveals the challenges faced by these majestic predators as climate change impacts their home.