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Researchers tracked polar bears with GPS system collarsand recorded long-distance swims up to 354 kilometres (220 mi), with an average of 155 kilometres (96 mi), taking up to ten days. [89] A polar bear may swim underwater for up to three minutes to approach seals on shore or on ice floes while hunting. [90] [91]
The polar bear (Ursus maritimus) is a large bear native to the Arctic and nearby areas. It is closely related to the brown bear, and the two species can interbreed.The polar bear is the largest extant species of bear and land carnivore, with adult males weighing 300–800 kg (660–1,760 lb).
Although polar bears spend most of their time on the ice rather than in the water, polar bears show the beginnings of aquatic adaptation to swimming (high levels of body fat and nostrils that are able to close), diving, and thermoregulation. Distinctly polar bear fossils can be dated to about 100,000 years ago.
Polar bears hunt primarily at the interface between ice, water, and air; they only rarely catch seals on land or in open water. [69] The polar bear's most common hunting method is still-hunting: [70] The bear locates a seal breathing hole using its sense of smell, and crouches nearby for a seal to appear. When the seal exhales, the bear smells ...
Image credits: Alex Daniel Since this list contains odd facts about nature and animals, here’s one about a frog that can glide through the air. If you haven’t heard about the Wallace’s ...
Marine mammals are aquatic mammals that rely on the ocean for their existence. They include animals such as sea lions, whales, dugongs, sea otters and polar bears. Like other aquatic mammals, they do not represent a biological grouping. [26] The humpback whale is a fully aquatic marine mammal.
Ice diving is underwater diving in water partly or completely covered by ice which may be an overhead obstacle to surfacing at some point of the dive, making ice diving a subclass of penetration diving. This can be in fresh or seawater, and the salinity of the water constrains the possible temperature range of the water.
Diving reflex in a human baby. The diving reflex, also known as the diving response and mammalian diving reflex, is a set of physiological responses to immersion that overrides the basic homeostatic reflexes, and is found in all air-breathing vertebrates studied to date.