of the coniferous forests. Plunge marks in the snow are usually the only evidence for its presence. Distinctive extra-large facial disks direct sound to feather covered ear openings, providing super-sensitive hearing. This enables the great grey owl to accurately locate prey, even under two feet of snow or in a tunnel. With soft feathers, it can unheard from its perch to dispatch an unfortunate with its sharp talons. The abundance of food, especially voles, is crucial for the number of a female will lay. Great grey owls will travel vast distances when local prey is scarce.
Source: http://www.bbc.co.uk/nature/life/Great_Grey_Owl
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