So much fault has been found with the misleading names of many birds, it is pleasant to record the fact that the name of the chimney swift is everything it ought to be. No other birds can surpass and few can equal it in its powerful flight, sometimes covering a thousand miles in twenty-four hours, it is said, and never resting except in its roosting places (hollow trees or chimneys of dwellings), where it does not perch, but rather clings to the sides with its sharp claws, partly supported by its sharper tail. Audubon tells of a certain plane tree in Kentucky where he counted over nine thousand of these swifts clinging to the hollow trunk.

Their nest, which is a loosely woven twig lattice, made of twigs of trees, which the birds snap off with their beaks and carry in their beaks, is glued with the bird's saliva or tree-gum into a solid structure, and firmly attached to the inside of chimneys, or hollow trees where there are no houses about. Two broods in a season usually emerge from the pure white, elongated eggs.