Isleria guttata
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~30%
The rufous-bellied antwren (Isleria guttata) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Brazil, French Guiana, Guyana, Suriname, and Venezuela. The rufous-bellied antwren was described and illustrated by the French ornithologist Louis Pierre Vieillot in 1824 and given the binomial name Myrmothera guttata. The current genus Isleria was introduced in 2012.
The rufous-bellied antwren and the plain-throated antwren (I. hauxwelli) share genus Isleria and the two form a superspecies. The rufous-bellied antwren is monotypic. The rufous-bellied antwren is 8.5 to 9.5 cm (3.3 to 3.7 in) long and weighs 8.5 to 11 g (0.30 to 0.39 oz). It has a very short tail. Adult males are mostly gray. They have a white patch between their scapulars and pale cinnamon spots on their uppertail coverts. Their wings and tail are blackish brown with cinnamon edges on the flight feathers and pale cinnamon tips on the wing coverts and tail feathers. Their throat is pale gray and their lower belly, flanks, and crissum are tawny. Adult females have olive-gray upperparts and a grayish olive breast;... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Brownsberg Nature Park | 🇸🇷 Suriname |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Rufous-bellied Antwren sighting in Brownsberg Nature Park on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 158th most-seen of the 221 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
April
In that month about 20% of wildlife watchers report a Rufous-bellied Antwren in Brownsberg Nature Park on a given day, against under 5% in August–October and December–February, the lowest months. That is one of Brownsberg Nature Park's wettest months, with about 300 mm of rain against 55 mm in October. May to July have too few records to rate.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Rufous-bellied Antwren 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 Brownsberg Nature Park, in our data
Brownsberg Nature Park is the only park on Wallace's Line with enough records to rate Rufous-bellied Antwren sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Thamnophilidae
The closest relatives of the Rufous-bellied Antwren that you can see in Brownsberg Nature Park (family Thamnophilidae, Typical Antbirds) are Guianan Warbling-Antbird (about 60%), Mouse-colored Antshrike (about 50%) and Gray Antbird (about 50%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rufous-bellied Antwren is recorded against all the birds logged in Brownsberg Nature Park (13 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.
