Millions of Red-eyed Vireos, Eastern Kingbirds, Chimney Swifts in Costa Rica- All Heading North
10,000 Birds
APRIL 10, 2021
When birding in parks and woodlots of Ohio, Virginia, and Toronto, places with groves of maples and old craggy oaks, it can be hard to imagine that the Red-eyed Vireos of constant song were foraging for caterpillar larvae in rainforest just a few months earlier. Birds are arriving in North America, flying from places far to the south.
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