: Breeds. to but widely distributed aerialist mid May-late Jul with Bar Harbor town being the most reliable location.
: but beginning early May with from late Apr, and again early Aug-late Sep with to early Oct.
Miscellany: Historically, Chimney Swifts nested in hollow trees but quickly adopted human chimneys and other structures when those appeared. Nests are fastened to vertical walls with the species' glue-like saliva.
Last Updated: March 22nd, 2022