information on threatened and endangered species in the United States from the U.S. Fish and Wildlife Service

provides a scientific basis for effective conservation action, with information about North American rare and endangered species and threatened ecosystems

an online reference source and database that seeks to provide information on each of the 1.8 million species that are named and known on this planet

seeks to design, implement, co-ordinate, and promote the compilation, linking, standardisation, digitisation and global dissemination of the world’s biodiversity data

a searchable database for identifying more than 4,000 plant and animal species of North America

has the objective of enumerating all known species of plants, animals, fungi and microbes on Earth as the baseline dataset for studies of global biodiversity

online database of animal natural history, distribution, classification, and conservation biology at the University of Michigan

major natural history museum libraries, botanical libraries, and research institutions have joined in developing a strategy and operational plan to digitize the published literature of biodiversity held in their respective collections, to be made available through a global “biodiversity commons”

a databases of vascular plant and vertebrate animal occurrences on the world's biosphere reserves and other protected areas from the Man and the Biosphere (MAB) Programs of UNESCO

provides a gateway to the world's botanical gardens, brings them together to work for plant conservation through science, education and horticulture

2007 annual checklist indexing the world's known species

assists the European Environment Agency in its work of collecting, analyzing, evaluating and synthesizing information relevant to national and international policies for the environment and sustainable development

focuses upon nature conservation and Mexican fauna, flora and ecosystems; with many photographs that illustrate the biological richness of the neotropics

authoritative taxonomic information on plants, animals, and microbes of North America and the world

provides an international forum for biological data projects while developing and promoting the use of standards to facilitate data exchange

allows you to view distribution maps and download UK wildlife data by using a variety of interactive tools

provides increased access to data and information on America's biological resources

a single source of standardized information about plants focusing on vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories