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Why do few bird species remain in the taiga throughout winter?
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Taiga
Boreal forest, Alaska, U.S., dominated by spruce trees (Picea).
Few bird species remain in the taiga throughout the winter primarily because of limited opportunities for food. The taiga experiences long, cold winters characterized by persistent snow cover and sub-freezing temperatures, which significantly restrict the availability of resources for many avian species.12
While most birds migrate to escape these harsh conditions, a small number of resident species have adapted to the environment. These include birds such as the common raven and various species of chickadees and tits, which are able to survive despite the scarcity of food.1