The Popular Barn Swallow
10,000 Birds
JULY 30, 2015
Swallows have migrated north to south along the Americas for millennia. Suddenly a group of barn swallows hatched in a barn or underpass in North America decides to stay in the wintering grounds and start a breeding colony there. Chicks in nest in Wyoming. Adult and fledglings in Murdo, South Dakota.
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