Nocturnal flight calls a sign of summer’s end

Sitting outside in our backyard on Friday evening (Aug. 23), I heard my first nocturnal flight calls of the “fall migration” as migrants were streaming southward overhead. I am not able to identify the birds to the species level – other than the thrushes, which tend to migrate in late September – but I did find the following website which I’ll refer to in the future. The flight calls of migrating birds at night always make me feel nostalgic, since they signal summer’s transition into fall.