Look for the all black butt to identify a Gadwall (male) [December; Bosque del Apache National Wildlife Refuge, San Antonio, New Mexico]
![Look for the all black butt to identify a Gadwall (male) [December; Bosque del Apache National Wildlife Refuge, San Antonio, New Mexico]](https://photos.smugmug.com/BIRDS/Ducks-Geese-Swans/Gadwall/i-2Jm9J9s/0/bbc70e62/S/Gadwall%20Bosque%20del%20Apache%20NM%20IMG_0016535-S.jpg)
