Part of the British Library, the National Sound Archive (NSA) in London is one of the largest sound archives in the world. The NSA Wildlife Section contains important collections of the sound recordings of animals. To date, more than 9,000 species of birds, mammals, insects, amphibians and other animals from most countries of the world are represented in this unique resource. The recordings are backed up with detailed documentation and nearly all are of animals in the wild. The recordings are available or research and educational uses. In addition, the NSA Wildlife Section provides information about other recordings, and about equipment and techniques for recording and analysis.