Tree swallows huddle for warmth on a crowded branch in a snowstorm.

A long line of tree swallows huddle for warmth on a crowded branch in a snowstorm.

Tree swallows huddle for warmth on a crowded branch in a snowstorm.

Tree swallows huddle for warmth on a crowded branch in a snowstorm.
Image
Photo By/Credit
Keith Williams
Recreational Activity
Species
Media Usage Rights/License
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0
Subject tags
Adaptation
Birds
Weather impacts
Wildlife