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Lineages leading to the 6 distinct living bear species in Ursus radiated from a common ancestor 6.3 million years ago (Pliocene). Distant ancestors: Molecular data indicate that the procyonid (raccoons, koatis, ringtails, kinkajous and others) and bear families diverged from each other about 30 million years ago (Oligocene).
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Polar bear, great white northern bear found throughout the Arctic region. The polar bear is the largest and most powerful carnivore on land, a title it shares with a subspecies of brown bear called the Kodiak bear.
Polar bears probably diverged about 200,000 years ago from an ancestral brown bear. Polar bears and brown bears are still closely related; when cross-bred, they produce fertile offspring. Take a deep dive and learn all about polar bears - from what they like to eat to how they care for their young.
The polar bear is the largest extant species of bear and land carnivore, with adult males weighing 300–800 kg (660–1,760 lb). The species is sexually dimorphic, as adult females are much smaller. The polar bear is white- or yellowish-furred with black skin and a thick layer of fat.
Class: Mammalia. Order: Carnivora. Family: Ursidae. Genus: Ursus. Species: maritimus. Polar bear’s scientific name, Ursus maritimus, means “sea bear” in Latin. Polar bears are called Nanuuq by...
This map shows the 19 subpopulations of polar bears across the Arctic. The largest bear in the world and the Arctic's top predator, polar bears are a powerful symbol of the strength and endurance of the Arctic. The polar bear's Latin name, Ursus maritimus, means "sea bear." It's an apt name for this majestic species, which spends much of its ...
This chapter comprises the following sections: names, taxonomy, subspecies and distribution, descriptive notes, habitat, movements and home range, activity patterns, feeding ecology, reproduction and growth, behavior, parasites and diseases, status in the wild, and status in captivity.
Polar bears are the most carnivorous bear species and almost exclusively eat meat. Their primary prey are ringed seals (Pusa hispida), according to the National Wildlife Federation. Polar...
The polar bear (Ursus maritimus) is the largest of the extant bear species and is classified as a marine mammal. Polar bears are protected under the Endangered Species Act and Marine Mammal Protection Act.