As we turn the corner into September, bird-watchers look to the skies. Birds of all sorts are on the move, some new to migration or making the return trip yet again. Soon, warblers will begin migrating from northern Wisconsin to Central America, bugling sandhill cranes will make their way to the Gulf Coast, and American kestrels will take the short trip to Illinois.
One delightful species joining in migration is an acrobatic bird that puts on a dazzling show most August and September evenings. They’re easy to identify, because they form swirling funnels of small, chattering flappers, circling around a chimney in the sunset.
Then, as the sun drops below the horizon, they start dropping in -- a smoking chimney in reverse.
These incredible birds are chimney swifts, a native summer breeder in Wisconsin that is now making its long trek to South America for the winter.