A “high intensity” bird migration event is expected to cross the Pittsburgh area Monday, with the possibility of more than 50,000 birds per square mile flying south.
SNETTISHAM, ENGLAND – NOVEMBER 24: A flock of waders, (predominantly knot) swirl above the Wash Estuary as the tide recedes revealing mudflat below on November 24, 2018 in Snettisham, United Kingdom. (Photo by Dan Kitwood/Getty Images) (Dan Kitwood/Getty Images)According to BirdCast, a collaboration between the EPA, the National Audubon Society, Cornell Lab of Ornithology, and other institutions, the birds will be in the sky above Pittsburgh around 7 p.m. Over Philadelphia, there could be more than 41,000 birds and over Harrisburg, there could be more than 50,000.