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.
Arrieta Wash in southern Arizona, July 2019. Arrieta Wash is in Buenos Aires National Wildlife Refuge, just north of the U.S. and Mexico border. Photo by Charles Drost, SBSC, USGS.
Public Domain.
