Canid Specialist Group 
Part of the IUCN's Species Survival Commission, dedicated to co-ordinating and conducting research and conservation activities worldwide to conserve endangered canid species. Includes accounts of the natural history of each of the 35 species of wild canids.
http://www.canids.org/IUCN/SSC Canid Specialist Group Publications 
Conservation action plans, papers, and Canid News, a journal with articles relevant to the biology and conservation of canid species.
http://www157.pair.com/speothos/publicat.htm
Wolves, Coyotes and Dogs 
Including the dire wolf, as found in the U.S. Midwest 16,000 years ago, from the Illinois State Museum.
http://www.museum.state.il.us/exhibits/larson/canis.html
Biodidac: Canid Skull 
Diagram of the skull of a canid.
http://biodidac.bio.uottawa.ca/Thumbnails/MAMM004B-GIF.htm
Canidae 
Family overview and species accounts from the Animal Diversity Web.
http://animaldiversity.ummz.umich.edu/site/accounts/information/Canidae.html
Raccoon Dogs 
Article by Jim Collins on this small canid, Nyctereutes procyonoides, which occurs in Asia and has spread into Eastern Europe. The author also describes the two pairs he has kept in captivity.
http://www.napak.com/raccoon_dogs.html