Raptor search covers the contents of Web pages, databases and documents produced by the National Biological Information Infrastructure, as well as a growing selection of other Web sites and sources concerned with wildlife, environmental issues and other aspects of biology.  The content searched by Raptor is selective, including U.S. government and other reliable sources, with a focus on science, and its sources include some that are not accessible through general Web search engines. Raptor's geospatial search capability is a special feature that searches only those Raptor sources with enough geographically-referenced information to permit mapping of search results and any associated data points.

An audiovisual introduction to the NBII and the Raptor search engine, lasting about twenty minutes, is available through this Webinar