Checklist, descriptions, and photos.
Names and literature citations for the 4,629 currently recognized species of mammals, in a taxonomic hierarchy that includes Order, Family, Subfamily, and Genus.
Introduction to mammals, with detailed information about subclasses and orders of mammals, from the Animal Diversity Web.
Biology of the infraorder Ungulata and related groups, including Artiodactyla, aardvarks, elephants, hyraxes, sea cows, and Perissodactyla.
Guide to the 181 species of Texas mammals, based on Davis and Schmidly's classic printed handbook.
Guide to Tasmania's mammals.
University of California Museum of Paleontology site providing an introduction the Class Mammalia and to the subcategories of mammals, including the marsupials, monotremes, multituberculata, and the eutheria (placentals).
A bibliography of publications concerning the geographical distribution of mammals.
With roughly 570,000 voucher specimens, by far the world's largest mammal collection. Located in Washington, DC, USA.
Biology, ecology, habitat, and status of rare, threatened and endangered species of mammals and information on their native countries: biodiversity, ecosystems, population, and land use.