» Animal Communication Project    Dedicated to the science of communication between animals. Covers many branches of the animal kingdom with links to both past and present research projects.    http://acp.eugraph.com

» Avisoft Bioacoustics    This company provides hardware and software for investigating sound communication in animals.    http://www.avisoft.com/

» Baboon Communication    Baboons have voice and communication but not the "theory of mind" to understand how their communications will affect others.    http://www.apa.org/releases/babooncalls.html

» Behaviour: Communication    Article on the signs and signals animals use to communicate and how they interpret them.    http://www.bbc.co.uk/nature/animals/mammals/explore/communication.shtml

» Bioacoustics    Information from Wikipedia on this cross-disciplinary science which combines biology with acoustics. It involves the investigation of the sounds produced by animals, their dispersal, reception and use.    http://en.wikipedia.org/wiki/Bioacoustics

» Bioacoustics Journal    This international journal, devoted to the study of animal sounds, publishes original research and review articles. There are also links to other relevant sites.    http://www.bioacoustics.info/

» Bioacoustics Research Program    A unit in the Cornell Lab of Ornithology, developing recording equipment, software, and algorithms to study animal communication and to monitor wildlife populations. Information about their research, products, and publications.    http://www.birds.cornell.edu/BRP/

» Bird and Mammal Communication Group    Two research groups at the School of Biology, St. Andrews Univerity, whose interests cover acoustic communication in birds and mammals. Information about their studies, staff, and publications.    http://biology.st-andrews.ac.uk/bmac/

» Borror Laboratory of Bioacoustics    Provides an archive of bird recordings, information on research, CDs for sale of bird, insect and amphibian sounds, and tips on making your own recordings.    http://blb.biosci.ohio-state.edu/

» Interdisciplinary Center for Bioacoustics    CIBRA provides extensive links to other sites on underwater bioacoustics and marine mammals, general bioacoustics, equipment, consultancy, services and related projects and organizations.    http://www.unipv.it/cibra/

» International Bioacoustics Council    IBAC aims to promote international participation throughout the field of bioacoustical activity.    http://www.ibac.info/

» Laboratory of Aquatic Bioacoustics    Research is mainly focussed on the study of hearing by fish and other aquatic organisms, behavioral investigations and responses to human-generated noise.    http://www.life.umd.edu/biology/popperlab/

» Whale Song    Information from Wikipedia on the production of sounds by whales and their purpose, with some audio clips.    http://en.wikipedia.org/wiki/Whale_song

» Wildlife Sound Recording Society    Formed to encourage collecting and understanding of wildlife sounds. Includes information about membership, events, articles, audio samples, and reviews of equipment. [UK]    http://www.wildlife-sound.org/

» Wildlife Sounds    The British Library Sound Archive holds more than 130,000 scientifically organised and documented recordings of every animal group and habitat from all over the world; offers samples, a catalogue, and information about services and access.    http://www.bl.uk/collections/sound-archive/wild.html

» Wildsong    Audio publisher producing recordings of UK birds and wild animals. Information on techniques, online sales and biacoustica.    http://www.wildsong.co.uk/