Anas platyrhynchos (Linnaeus, 1758), female and male (front) - The Mallard Boronda Lake, Foothills Park, Santa Clara Co., CA, Mar. 19, 2009 © Donald H. Gudehus

Anas platyrhynchos (Linnaeus, 1758), male - The Mallard Boronda Lake, Foothills Park, Santa Clara Co., CA, Mar. 19, 2009 © Donald H. Gudehus

Anas platyrhynchos (Linnaeus, 1758), male - The Mallard Delta Ponds, Eugene, OR, Lane Co., CA, February 14, 2013 © Donald H. Gudehus

Anas platyrhynchos (Linnaeus, 1758), female - The Mallard Eugene, OR, April 4, 2009 © Donald H. Gudehus

Anas platyrhynchos (Linnaeus, 1758), female - The Mallard Delta Ponds, East of Hwy., Eugene, Lane Co., OR, January 22, 2013 © Donald H. Gudehus

Anas platyrhynchos (Linnaeus, 1758), eggs - The Mallard Briggs Farm, Eugene, OR, May 22, 2009 © Donald H. Gudehus

Anas platyrhynchos (Linnaeus, 1758), male, in eclipse, and female - The Mallard Delta Ponds, East of Hwy. Eugene, Lane Co., OR, July 15, 2013 © Donald H. Gudehus

Anas platyrhynchos (Linnaeus, 1758), male and female in synchronized diving - The Mallard Delta Ponds, West of Hwy. Eugene, Lane Co., OR, February 15, 2018 © Donald H. Gudehus

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