Find WAVs of animal sounds at sites such as Cornell’s Macauly Library and Freesound. Both sites offer large selections of high quality audio animal sounds that users can stream and download.
Cornell’s Macauly Library is a part of the university’s Lab of Ornithology, but the library’s online home houses an enormous selection of animal sounds, including mammals, reptiles, amphibians, arthropods and fishes. Users can stream sounds for free but must pay to download WAV files.
Freesound is a collaborative database of free-use songs, hosting thousands of user-submitted audio files. The site offers a substantial collection of animal sounds, which users can search or browse by tag. Downloading the files in WAV format requires free registration on the site.