Wisconsin Swifts

https://madisonaudubon.org/events/2020/9/1/a-swift-night-out-wisconsin

A Swift Night Out Wisconsin — Madison Audubon An online, Wisconsin-wide citizen science event through September. Join in!

I've been checking swifts at Cherokee Heights Middle School in Madison this summer. Here are dates and numbers down the chimney on those dates:
6/17 123
7/1 140
7/18 210
8/5 383
8/19 690

Have you taken the WI DNR Chimney Swift survey yet?
This Wisconsin DNR survey seeks to identify chimneys providing bird habitat - A Pilot Project Aims To Help Owners Pay For Repairs To Preserve Habitat

Got Swifts? Survey Seeks To Identify Chimneys Providing Bird Habitat MADISON, Wis. - Brick chimneys may be a key component to conserving acrobatic, fast-flying chimney swifts, so Wisconsin residential and commercial property owners are being asked to report if their chimneys are currently being used by swifts through an online survey. Conducted by the Wisconsin Chimn...