Polar Bears
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Publicado: 19 de marzo de 2015
Polar Bears
Where do polars bears live?
Polar bears live in the circumpolar north in areas where they can hunt their primary prey, ice seals. They are found in Canada (home to roughly 60% of theworld's polar bears), the U.S. (Alaska), Greenland, Russia, and Norway (the Svalbard archipelago).
The polar bear Range States have identified 19 populations of polar bears living in four different seaice regions across the Arctic.
Although popular art and children's books often show polar bears and penguins together, the two live at opposite poles. Polar bears live in the Arctic, a massive frozensea surrounded by continents. Penguins live in Antarctica, an ice-covered continent surrounded by oceans.
Characteristics: Fur and skin
Fur. Polar bears' fur consists of a dense, insulating underfurtopped by guard hairs of various lengths. It is not actually white—it just looks that way.
Each hair shaft is pigment-free and transparent with a hollow core that scatters and reflects visible light,much like what happens with ice and snow.
Polar bears look whitest when they are clean and in high angle sunlight, especially just after the molt period, which usually begins in spring and is completeby late summer. Before molting, accumulated oils in their fur from the seals they eat can make them look yellow.
Skin. Polar bears have black skin under which there is a layer of fat that can measureup to 4.5 inches (11.5 centimeters) thick.
On land (or on top of the sea ice) the polar bear's thick fur coat—not its fat—prevents nearly any heat loss. In fact, adult males can quickly overheat whenthey run.
Osos Polares
¿Dónde viven los osos polares?
Los osos polares viven en el norte circumpolar en áreas donde pueden cazar su presa principal, los sellos de hielo. Se encuentran en Canadá (elhogar de aproximadamente el 60% de los osos polares del mundo), los EE.UU. (Alaska), Groenlandia, Rusia y Noruega (el archipiélago de Svalbard).
El oso polar Range Estados ha identificado 19...
Where do polars bears live?
Polar bears live in the circumpolar north in areas where they can hunt their primary prey, ice seals. They are found in Canada (home to roughly 60% of theworld's polar bears), the U.S. (Alaska), Greenland, Russia, and Norway (the Svalbard archipelago).
The polar bear Range States have identified 19 populations of polar bears living in four different seaice regions across the Arctic.
Although popular art and children's books often show polar bears and penguins together, the two live at opposite poles. Polar bears live in the Arctic, a massive frozensea surrounded by continents. Penguins live in Antarctica, an ice-covered continent surrounded by oceans.
Characteristics: Fur and skin
Fur. Polar bears' fur consists of a dense, insulating underfurtopped by guard hairs of various lengths. It is not actually white—it just looks that way.
Each hair shaft is pigment-free and transparent with a hollow core that scatters and reflects visible light,much like what happens with ice and snow.
Polar bears look whitest when they are clean and in high angle sunlight, especially just after the molt period, which usually begins in spring and is completeby late summer. Before molting, accumulated oils in their fur from the seals they eat can make them look yellow.
Skin. Polar bears have black skin under which there is a layer of fat that can measureup to 4.5 inches (11.5 centimeters) thick.
On land (or on top of the sea ice) the polar bear's thick fur coat—not its fat—prevents nearly any heat loss. In fact, adult males can quickly overheat whenthey run.
Osos Polares
¿Dónde viven los osos polares?
Los osos polares viven en el norte circumpolar en áreas donde pueden cazar su presa principal, los sellos de hielo. Se encuentran en Canadá (elhogar de aproximadamente el 60% de los osos polares del mundo), los EE.UU. (Alaska), Groenlandia, Rusia y Noruega (el archipiélago de Svalbard).
El oso polar Range Estados ha identificado 19...
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