Calling lost chickadees in far north poplars

NORTH SLOPE, Alaska — “Chick chick whirrr, chick whirrr.” Although it was a recorded birdsong that chattered through each of the poplar stands we entered, I still occasionally caught myself believing we were hearing the real thing — the call of the gray-headed chickadee, last heard in Alaska in 2018. Tom Glass, a postdoctoral researcher […]