Did you know that the British Library's vast collections also include a wide variety of wildlife sounds? In the web presentation The Language of Birds, recordings from the library's sound collections, along with photographs, accompany a series of accessibly-written articles that explore and illustrate why and how birds communicate. Here, interested readers can learn about birdsong and how it differs from bird calls, the physiology of birds' vocalizations and hearing, how birds learn to sing and mimic, and the non-vocal ways that birds use sound to communicate (such as a woodpecker's drumming). This presentation includes a total of 15 articles, as well as 53 sound recordings with accompanying images featuring songbirds such as the nightingale and chaffinch, as well as other species such as parrots, peacocks, and ruffed grouse. The Language of Birds was written by Jeffery Boswall, a natural history broadcaster with the BBC, and originally published in Proceedings of the Royal Institution.