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Robins in parts of Colorado spend the winter at low elevations where the temperatures are mild. In the spring, it gets even warmer. This cue tells robins it’s time to head up to the mountains where they'll find plenty of nesting sites and food. After all, they can handle the temperatures! Photo: Charles Russell (c) charlesimages   This Season Teachers Kids Orientation Registration Search Copyright 1997-2009 Journey North. All Rights Reserved. Questions or comments? Contact us.