If you are lucky enough to have chimney swifts nesting in your chimney, you are probably wondering how many active nests are found in an individual chimney. 

       The answer might surprise you.  The truth of the matter is only one of these remarkable nest is attached to the interior wall of a chimney.  Typically, the female lays a clutch of 4-7 eggs in a saucer shaped nest.

       The vast majority the breeding pairs raise only one brood per season.  In states such as Texas where chimney swifts have a longer breeding season sometimes two broods are raised in the same year.