An official website of the United States government
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.
Scientists at ARS are collecting thousands of units of semen from Navajo-Churro sheep like the one shown here. The goal is to preserve the germplasm from this breed, which is valued by the Navajo tribe of the Southwest because its wool is preferred by handspinners.