Tolmomyias sulphurescens
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~30% in a week ~60%
The yellow-olive flatbill or yellow-olive flycatcher (Tolmomyias sulphurescens) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Mexico, in every Central American country, on Trinidad, and in every mainland South American country except Chile.
The yellow-olive flatbill has these 16 subspecies: Since the late twentieth century several authors have suggested that what is now considered a single species is actually several species, perhaps as many as 12. Some authors consider several of the South American subspecies to be "dubious".
The yellow-olive flatbill is 12.5 to 14 cm (4.9 to 5.5 in) long and weighs 14.5 to 15.2 g (0.51 to 0.54 oz). The sexes have the same plumage. Adults of the nominate subspecies T. s. sulphurescens have a dark olive crown and nape, a thin white band above the lores, a thin white eye-ring, and pale olive ear coverts with a dusky patch at their rear. Their upperparts are olive-green. Their wings are dusky... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Campo Grande | 🇧🇷 Brazil | |
| 2 | Goiânia | 🇧🇷 Brazil | |
| 3 | Cali | 🇨🇴 Colombia | |
| 4 | Caracas | 🇻🇪 Venezuela | |
| 5 | Rio de Janeiro | 🇧🇷 Brazil | |
| 6 | Belo Horizonte | 🇧🇷 Brazil | |
| 7 | Santos | 🇧🇷 Brazil | |
| 8 | San Salvador | 🇸🇻 El Salvador | |
| 9 | Manaus | 🇧🇷 Brazil | |
| 10 | Guayaquil | 🇪🇨 Ecuador |
With luck
About 10% of wildlife watchers report a Yellow-olive Flycatcher sighting in Machalilla National Park on a given day, based on 66 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 81st most-seen of the 248 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
April
In that month about 30% of wildlife watchers report a Yellow-olive Flycatcher in Machalilla National Park on a given day, against under 5% in February and July, the lowest months. That is one of Machalilla National Park's wettest months, with about 60 mm of rain against 5 mm in September.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Yellow-olive Flycatcher sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
26th of 64
Of the 64 parks where we can rate Yellow-olive Flycatcher sightings, Machalilla National Park ranks 26th at about 10%. The best odds are in Serra dos Órgãos National Park (Brazil, about 50%), Santa Rosa National Park (Costa Rica, about 50%) and Amboró National Park (Bolivia, about 40%). All parks ranked.
Same family: Tyrannidae
The closest relatives of the Yellow-olive Flycatcher that you can see in Machalilla National Park (family Tyrannidae, Tyrant Flycatchers) are Tropical Kingbird (about 40%), Fulvous-headed Pygmy-Tyrant (about 40%) and Southern Beardless-Tyrannulet (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-olive Flycatcher is recorded against all the birds logged in Machalilla National Park (66 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.
