A Suggested Antipredator Function for Snow-Roosting Behaviour in the Black Grouse Tetrao tetrix

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Abstract
Several studies suggest that grouse conserve heat in cold winter weather by snow-roosting. However, Black Grouse frequently snow-roost even in mild weather when it may not be necessary for energetic reasons, and in moist snow when there is the risk of being imprisoned after freezing of the snow. Thus, snow roosting may also have other important functions for Black Grouse, such as the avoidance of predators.

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