Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
USGS Oklahoma Water Science Center Hydrologist Carol Becker collects fecal samples from American Bison for a bacterial ribotyping study at Tall Grass Prairie in Osage County, Oklahoma.
Public Domain.
