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. All of those birds also fly to and from the woods of Pennsylvania to parts of the Amazon rainforest and back. The same can be said of Scarlet Tanagers, Canada Warblers and Eastern Wood-Pewees.
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