GREEN BAY (WLUK) — As fall migration is getting underway in parts of Northeast Wisconsin, some birds are starting to appear.
Experts say chimney swifts gather in large flocks at dusk before swirling together and entering a chimney to roost for the night. Birdwatchers are tracking them as part of the event called “Swift Night Out.”
“Chimney swifts are starting to gather for roosting, and they’re dropping in the chimney,” said Sue Ascher of Sobieski…