Order
Anseriformes
Family
Anatidae
Genus
Anas
Neotropical Birds logo
Version 1.0

This is a historic version of this account.  Current version

 - Mexican Duck
 - Mexican Duck
Listen

Mexican Duck Anas diazi

Authors not available
Version: 1.0 — Published August 16, 2018

Sign in to see your badges

Welcome to Birds of the World!

You are currently viewing one of the free accounts available in our complimentary tour of Birds of the World. In this courtesy review, you can access all the life history articles and the multimedia galleries associated with this account.

For complete access to all accounts, a subscription is required.

Subscribe Now

Already a subscriber? Sign in

Mexican Duck is the southernmost member in the New World of a suite of species in the Mallard (Anas platyrhynchos) complex. Mallard is sexually dimorphic, but in Mexican Duck and related species (such as American Black Duck Anas rubripes and Mottled Duck Anas fulvigula) the sexes are similar in plumage (although differing in more subtle ways, such as in bill color). Mexican Duck occurs from the southwestern United States south to central Mexico. Its breeding distribution probably was allopatric or parapatric to Mallard until recently, but the two have come into contact in Arizona and New Mexico, where they hybridize. On this basis, some authorities have classified Mexican Duck as only a subspecies of Mallard, although genetic evidence suggests that Mexican Duck may be more closely related to Mottled Duck than it is to Mallard. It was feared, in the late 20th century, that Mexican Duck was endangered in the United States, but in recent years its populations have rebounded, and in fact it may be expanding its range in Mexico, by taking advantage of irrigated farmlands.

Distribution of the Mexican Duck
Enlarge
  • Year-round
  • Migration
  • Breeding
  • Non-Breeding
Distribution of the Mexican Duck

Recommended Citation

(2018). Mexican Duck (Anas diazi), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/nb.mexduc.01