Species occurrence data for the nation

USGS Biodiversity Information Serving Our Nation (BISON) is a unique, web-based Federal mapping resource for species occurrence data in the United States and its Territories.

BISON’s size is unprecedented, including records for most living species found in the United States and encompassing the efforts of more than a million professional and citizen scientists. Most of BISON’s species occurrence records are specific locations, not just county or State records.