Wilson & Reeder's Mammal Species of the World | 3rd Edition
IUCN (International Union for Conservation of Nature) Red List of Threatened Species - The IUCN Species Program working with the IUCN Species Survival Commission (SSC) has for more than four decades been assessing the conservation status of species, subspecies, varieties, and even selected subpopulations on a global scale in order to highlight taxa threatened with extinction, and therefore promote their conservation.
IUCN - helps the world find pragmatic solutions to our most pressing environment and development challenges
Integrated Taxonomic Information System (ITIS) - here you will find authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.
Encyclopedia of Life (EOL) - an unprecedented global partnership between the scientific community and the general public. The EOL goal is to make freely available to anyone knowledge about all the worldâ€™s organisms.
Global Biodiversity Information Facility (GBIF) - an international organisation that is working to make the world's biodiversity data accessible everywhere in the world. GBIF and its many partners work to mobilise the data, and to improve search mechanisms, data and metadata standards, web services, and the other components of an Internet-based information infrastructure for biodiversity.
Smithsonian Institution, National Museum of Natural History (NMNH) Department of Vertebrate Zoology, Division of Mammals - The Division of Mammals houses a world-class collection of roughly 590,000 preserved specimens. This collection supports a wide range of scientific research by resident staff and associates, as well as numerous visiting scientists.
American Society of Mammalogists (ASM) - established in 1919 for the purpose of promoting interest in the study of mammals.