Birds of The World (Formerly Birds of North America)
Encyclopedia of North American birds.
Searchable database of international floras, including Flora of North America
Montana Natural Heritage Program
Includes Species of Concern, Montana Field Guide, animal, plant, and ecology information, and Montana state reports and information related to Montana's plants and animals.
Online Mendelian Inheritance in Man (OMIM)
OMIM is a comprehensive, authoritative compendium of human genes and genetic phenotypes that is freely available and updated daily.
The PLANTS Database provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories.
Leading taxonomic reference and unofficial registry of animal names.