are native to the Colorado River, which originates in Rocky Mountain National Park. Photo courtesy of the U.S. Fish and Wildlife Service National Image Library. |
Last updated: February 24, 2015
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.