USDA provide vision to preserve our Nation's natural resources through conservation, restored forests, improved watersheds, and healthy private working lands.
The Biodiversity Heritage Library works collaboratively to make biodiversity literature openly available to the world as part of a global biodiversity community. BHL also serves as the foundational literature component of the Encyclopedia of Life.
The Catalogue of Life is a comprehensive and authoritative global index of species with essential information on the names, relationships and distributions of over 1.5 million species.
From USGS, this site offers programs, databases, monitoring information and much more. If you are interested in the ramifications of invasive species, this is a good place to start.
Neotropical Birds Online is an authoritative, online resource for life histories of Neotropical birds.The scope of Neotropical Birds Online is all bird species that regularly occur in the Neotropics, from Mexico and the Caribbean south to southernmost South America. The emphasis is on species that breed within this region, but the eventual goal is to provide accounts for all species that regularly occur within this region.