Anas strepera strepera (Linnaeus, 1758), male and female - The Gadwall Delta Ponds, Eugene, Lane Co., OR, January 10, 2012 © Donald H. Gudehus

Anas strepera strepera (Linnaeus, 1758), male - The Gadwall Delta Ponds, Eugene, Lane Co., OR, January 10, 2012 © Donald H. Gudehus

Anas strepera strepera (Linnaeus, 1758), female - The Gadwall Delta Ponds, Eugene, Lane Co., OR, January 10, 2012 © Donald H. Gudehus

Anas strepera strepera (Linnaeus, 1758), female - The Gadwall Boronda Lake, Foothills Park, Palo Alto, CA, November 17, 2017 © Donald H. Gudehus