Uropsila leucogastra
Silhouette: Matt Wilkins · PhyloPic
In 3 days ~20% in a week ~50%
The white-bellied wren (Uropsila leucogastra) is a species of bird in the family Troglodytidae. It is found in Belize, Guatemala, Honduras, and Mexico. The white-bellied wren is the only member of genus Uropsila, but its taxonomy at the subspecies level is uncertain. Cornell qualifies their additions by noting that australis "may be separable" and that grisescens is "doubtfully valid" because it was based on soot-discolored specimens.
The white-bellied wren is 9.5 to 10 cm (3.7 to 3.9 in) long. Males weigh 9.8 to 10.5 g (0.35 to 0.37 oz) and females 8 to 9.1 g (0.28 to 0.32 oz). The nominate subspecies has a medium brown crown, upperparts, and tail; the rump is slightly reddish and the tail has many thin... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Calakmul Biosphere Reserve | 🇲🇽 Mexico | |
| 2 | Tikal National Park | 🇬🇹 Guatemala | |
| 3 | Montes Azules Biosphere Reserve | 🇲🇽 Mexico | |
| 4 | Biotopo Cerro Cahuí | 🇬🇹 Guatemala | |
| 5 | Sian Ka'an Biosphere Reserve | 🇲🇽 Mexico | |
| 6 | Celestún Biosphere Reserve | 🇲🇽 Mexico |
With luck
About 10% of wildlife watchers report a White-bellied Wren sighting in Sian Ka'an Biosphere Reserve on a given day, based on 186 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 127th most-seen of the 288 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
May and June
In those months about 20% of wildlife watchers report a White-bellied Wren in Sian Ka'an Biosphere Reserve on a given day, against under 5% in February and September, the lowest months. Those are among Sian Ka'an Biosphere Reserve's wettest months, with about 160 mm of rain a month against 30 mm in March.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most White-bellied Wren sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
5th of 6
Of the 6 parks where we can rate White-bellied Wren sightings, Sian Ka'an Biosphere Reserve ranks 5th at about 10%. The best odds are in Calakmul Biosphere Reserve (Mexico, about 30%), Tikal National Park (Guatemala, about 30%) and Montes Azules Biosphere Reserve (Mexico, about 10%).
GBIF citizen-science records
It is estimated from how often the White-bellied Wren is recorded against all the birds logged in Sian Ka'an Biosphere Reserve (186 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.
