Anas diazi
Silhouette: Sheatherius · PhyloPic
In 3 days ~50% in a week ~80%
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 |
Possible
About 20% of wildlife watchers report a Mexican Duck sighting in Toluca on a given day, based on 43 verified sightings from GBIF citizen-science data. It is the 42nd most-seen of the 118 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
September
In that month about 50% of wildlife watchers report a Mexican Duck in Toluca on a given day, against about 10% in January, March–June, August and November, the lowest months. That is one of Toluca's wettest months, with about 150 mm of rain 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.
5th of 13
Of the 13 cities where we can rate Mexican Duck sightings, Toluca ranks 5th at about 20%. The best odds are in Ciudad Juárez (México, about 80%), Puebla (México, about 40%) and Mexico City (México, about 40%).
Same genus: Anas
The closest relatives of the Mexican Duck that you can see in Toluca (genus Anas, Mallards, Pintails, and Allies) are Mallard (about 10%) and Green-winged Teal (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Mexican Duck is recorded against all the birds logged in Toluca (43 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.
