Far from having a stern librarian to “shush!” you and your friends, the Macaulay Library is, in fact, the noisiest library around! Housed at the Cornell Lab of Ornithology, the Macaulay Library’s online archive is the world’s largest archive of animal sounds and video. Rather than simply being limited to bird sounds (as one might expect from an ornithology laboratory), the Macaulay Library also houses the sounds of amphibians, fish, mammals, and reptiles. Visitors to the site can search the collection by common/scientific name or catalog number, or they can browse by animal group. For researchers interested in analyzing the sounds, rather than simply listening to and enjoying them, there is a free plug-in (RavenViewer) that allows you to visually analyze the sounds as you play them.