Early September is a fabulous time to listen for Chimney Swifts, as they are migrating in full force from the US (including Wisconsin) to the Amazon basin in South America. During this time, Chimney Swifts will form big flocks at sunset through dusk, swirling around in a tornado of birds above a big chimney. Eventually they drop in and cling to the inside of the chimney, where they sleep for the night. It’s an amazing sight to behold, and full of the most adorable Chimney Swift twittering noises you can imagine! It’s so fun to watch, events called Swift Night Out are held around the country, including in Wisconsin.
Photo by Brenna Marsicek/SoWBA