NatureServe Explorer
http://www.natureserve.org/explorer/
NatureServe Explorer is “an authoritative source for information on more than 60,000 plants, animals, and ecosystems of the United States and Canada. Explorer includes particularly in-depth coverage for rare and endangered species.
Search the database for species or ecological communities & systems. Information can be easily accessed about: scientific and common names, conservation, status, distribution mapslife histories, conservation needs, and more.”
The website links to InfoNatura a database of “data on the animals and ecosystems of Latin America.”


