Oreophasis derbianus
Silhouette: Sheatherius · PhyloPic
In 3 days ~40% in a week ~70%
The horned guan (Oreophasis derbianus) is an endangered species in an ancient group of birds of the family Cracidae, which are related to the Australasian megapodes or mound builders (Megapodiidae). It is found in Mexico, Guatemala, and possibly Honduras.
The horned guan is not closely related to other guans, but merely resembles these birds in overall shape and color, whereas the horn is more reminiscent of the helmeted curassows. The species is the only survivor of a very ancient lineage of cracids that has been evolving independently from all other living members of this family for at least 20 million years, and possibly as much as 40 million years. Given that the basal relationships of the living cracids are not well resolved, the horned guan is often placed in its own subfamily Oreophasinae. Other taxonomists have placed it in either subfamily Cracinae or Penelopinae.
The holotype specimen of the horned guan is held in the collections of National Museums Liverpool at World Museum, with accession number NML-VZ D210. The specimen was collected from Volcán de Fuego, Guatemala by Don Joaquin Quinones circa 1843 and came to the Liverpool national collection... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | El Triunfo | 🇲🇽 Mexico |
More parks will be added in future updates.
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Walsrode World Bird Park | 🇩🇪 Germany | |
| 2 | Parque Zoológico de León - Zooleón | 🇲🇽 Mexico | |
| 3 | Africam Safari | 🇲🇽 Mexico | |
| 4 | Guadalajara Zoo | 🇲🇽 Mexico | |
| 5 | Safari Masai Mara | 🇲🇽 Mexico | |
| 6 | Zoológico Miguél Álvarez del Toro | 🇲🇽 Mexico |
Possible
About 20% of wildlife watchers report a Horned Guan sighting in El Triunfo on a given day, based on 52 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 111th most-seen of the 221 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
April
In that month about 50% of wildlife watchers report a Horned Guan in El Triunfo on a given day, against about 10% in May and July–February, the lowest months. That is one of El Triunfo's driest months, with about 65 mm of rain against 420 mm in June. June has too few records to rate.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Horned Guan sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only El Triunfo, in our data
El Triunfo is the only park on Wallace's Line with enough records to rate Horned Guan sightings: about 20% of wildlife watchers there report one on a given day.
Same family: Cracidae
The closest relatives of the Horned Guan that you can see in El Triunfo (family Cracidae, Guans, Chachalacas, and Curassows) are Highland Guan (about 30%) and Crested Guan (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Horned Guan is recorded against all the birds logged in El Triunfo (52 verified sightings from 2019 to 2026), 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.
