Gloucestershire Naturalists' Society - A natural history recording organisation for Gloucestershire, recording birds, mammals, insects, wildflowers, and all wildlife in the county. - http://www.glosnats.org.uk/
Birding Gloucestershire - Best spots, places to stay, and links. - http://www.fatbirder.com/links_geo/europe/england_gloucestershire.html
Cheltenham Bird Club - Meetings and events, field trips, sightings, and trip reports. - http://beehive.thisisgloucestershire.co.uk/cheltbirdclub
Gloster Birder - News, sightings, message board, and site guides. - http://www.birder.pwp.blueyonder.co.uk/
National Birds of Prey Centre - Houses a large collection of birds of prey of the world, about 300 birds of over 80 species. Education, captive breeding, research, and rehabilitation programs. - http://www.nbpc.co.uk/
Barn Owl Centre - Sanctuary and rehabilitation center for owls. - http://www.thebarnowlcentre.co.uk/