chimney swifts entering their evening roost

[click in the lower right corner to enlarge]

Hundreds of migrant chimney swifts enter the chimney at Free State Bookbinders in Baltimore City last night for their evening roost. Recent rough estimates come in around 2000 birds roosting in this single chimney, though on peak migration nights that number can double or even triple. If you do some investigation in your area you may find there’s an annual event like this near you, too. If there is, I highly recommend checking it out–it’s quite a spectacle! More info here.

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