“The quickness of the motions of this active little bird is fully equal to that of the mouse.  Like the latter, it appears and is out of sight in a moment, peeps into a crevice, passes rapidly through it, and shews itself at a different place the next instant.  When satiated with food, or fatigued with these multiplied exertions, the little fellow stops, droops its tail, and sings with great energy a short ditty something resembling the words come-to-me, come-to-me, repeated several times in quick succession, so loud, and yet so mellow, that it is always agreeable to listen to them.  During spring, these notes are heard from all parts of the plantations, the damp woods, the swamps, the sides of creeks and rivers, as well as from the barns, the stables and the piles of wood, within a few yards of the house.”

–J. J. Audubon, Ornithological Biography, I (1831), 399 [excerpted].