Blue-footed Boobies, flocks, Tree Swallows
Answers to readers' questions about foot colors, flying, and ground-foraging
Contributed by Julie Craves
Published:
April 25, 2008
Contributing Editor Julie Craves answers readers' questions about why Blue-footed Boobies have blue feet, how flocks manage to fly in unison, and why normally high-flying swallows eat off the ground.
Read more about Julie Craves »
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