Anas diazi
Silhouette: Sheatherius · PhyloPic
In 3 days ~80% in a week >90%
The Mexican duck (Anas diazi) is a species of dabbling duck that breeds in Mexico and the southwestern United States. Most of the population is resident, but some northern birds migrate south to Mexico in winter. The species also occurs widely, but in limited numbers, in Colorado in all seasons and there are photographs of birds referable to this taxon from Utah, Wyoming, Nebraska, and Montana.
Mexican Ducks reside in almost all aquatic habitats. The bird has a length of 45–55 cm (17.7–21.6 in) and a weight of 849–1,243 g (1.872–2.740 lb) The Mexican duck is mainly brown, with a blue speculum edged with white, obvious in flight or at rest. The male has a brighter yellow bill than the female.
The Mexican duck was considered a subspecies of the mallard, as Anas platyrhynchos diazi until 2020, when the American Ornithological Society determined the Mexican Duck to be its own species. Analysis of mtDNA control region sequence data—taking into account hybridization events—indicates it is the southwestern relative of the American black duck and shares a fairly recent common ancestry with this species (McCracken et al. 2001).... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Bend National Park | 🇺🇸 United States | |
| 2 | Saguaro National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Ciudad Juárez | 🇲🇽 México | |
| 2 | Puebla | 🇲🇽 México | |
| 3 | Mexico City | 🇲🇽 México | |
| 4 | León | 🇲🇽 México | |
| 5 | Toluca | 🇲🇽 México | |
| 6 | San Luis Potosí | 🇲🇽 México | |
| 7 | Torreón | 🇲🇽 México | |
| 8 | Guadalajara | 🇲🇽 México | |
| 9 | Mesa | 🇺🇸 United States | |
| 10 | Las Vegas | 🇺🇸 United States |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Parque Zoológico de León - Zooleón | 🇲🇽 Mexico | |
| 2 | Chapultepec Zoo | 🇲🇽 Mexico | |
| 3 | Fish Spa Acuario Fantasia | 🇲🇽 Mexico |
Likely
About 40% of wildlife watchers report a Mexican Duck sighting in Mexico City on a given day, based on 5,310 verified sightings from GBIF citizen-science data. It is the 20th most-seen of the 332 birds we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
May to August
In those months about 50% of wildlife watchers report a Mexican Duck in Mexico City on a given day, against about 40% in September to April, the lowest months. Those are among Mexico City's wettest months, with about 120 mm of rain a month against 5 mm in December.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Mexican Duck sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 13
Of the 13 cities where we can rate Mexican Duck sightings, Mexico City ranks 3rd at about 40%. The best odds are in Ciudad Juárez (México, about 80%) and Puebla (México, about 40%).
GBIF citizen-science records
It is estimated from how often the Mexican Duck is recorded against all the birds logged in Mexico City (5,310 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
