Chimney swift nest

I discovered this Chimney Swift nest as part of a bat survey in a City Park in Allentown PA in July of 2016. As the Lehigh Valley Audubon Society Habitat Committee Chairman, I have built several Chimney Swift towers throughout the park system, and they are my #1 species of conservation concern here. This nest is located in the stone chimney of a log cabin built in the 1720’s. Imagine how many little swifts may have fledged from this chimney in over 290 years!