With the autumnal equinox, we're starting our fall 2021 bird species and behavior surveys. We've been out sharpening our identification skills, and noticed a few things of interest. We heard a Common Raven (Corvus corax) at Grace Cole Nature Park.  Also, the House Sparrows (Passer domesticus) were conspicuously absent from Crown Hill Glen. Hopefully, we're hear them once our surveys start. Photo: Barred Owl by Kim Wacker