Millions of Red-eyed Vireos, Eastern Kingbirds, Chimney Swifts in Costa Rica- All Heading North
10,000 Birds
APRIL 10, 2021
Many Red-eyed Vireos have seen Harpy Eagles , have kept still upon hearing the haunting calls of forest-falcons. How about 500 and then 300 and then another 500 and so on, moving constantly past like some odd version of a winter finch irruption or spring blackbird migration. For birds, there are no borders.
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