An official website of the United States government
Here’s how you know
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.
Sandhill crane abundance on Wheeler Refuge from 2002 to 2024. Abundance estimates are derived from biweekly ground-based surveys conducted by refuge staff and volunteers.