Tolmomyias poliocephalus
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~30% in a week ~50%
The grey-crowned flatbill or grey-crowned flycatcher (Tolmomyias poliocephalus) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in every mainland South American country except Argentina, Chile, Paraguay, and Uruguay.
The grey-crowned flatbill was originally described as Rhynchocyclus poliocephalus. Subspecies T. p. klagesi was originally described as a separate species, Rhynchocyclus klagesi, and was treated as such by some early twentieth century authors. By the second half of the century it was widely accepted in its current status. Its validity as a separate taxon has been disputed and some authors include it within T. p. sclateri.
The gray-crowned flatbill is 12 to 12.5 cm (4.7 to 4.9 in) long and weighs about 11 g (0.39 oz). The sexes have the same plumage. Adults of the nominate subspecies have a mostly gray head with a whitish stripe above the lores, a faint whitish eye-ring, and greenish gray ear coverts. Their back, rump, uppertail coverts... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Amacayacu National Natural Park | 🇨🇴 Colombia | |
| 2 | Anavilhanas National Park | 🇧🇷 Brazil | |
| 3 | Tambopata National Reserve | 🇵🇪 Peru | |
| 4 | Yasuní National Park | 🇪🇨 Ecuador | |
| 5 | Manu National Park | 🇵🇪 Peru | |
| 6 | Brownsberg Nature Park | 🇸🇷 Suriname | |
| 7 | Sierra de la Macarena National Park | 🇨🇴 Colombia |
With luck
About 10% of wildlife watchers report a Gray-crowned Flycatcher sighting in Yasuní National Park on a given day, based on 323 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 165th most-seen of the 533 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
March and August
In those months about 20% of wildlife watchers report a Gray-crowned Flycatcher in Yasuní National Park on a given day, against under 5% in January–February and June, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Gray-crowned Flycatcher sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 7 parks where we can rate Gray-crowned Flycatcher sightings, Yasuní National Park ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Amacayacu National Natural Park (Colombia, about 10%), Anavilhanas National Park (Brazil, about 10%) and Tambopata National Reserve (Peru, about 10%).
Same genus: Tolmomyias
The closest relatives of the Gray-crowned Flycatcher that you can see in Yasuní National Park (genus Tolmomyias, Tolmomyias Flatbills) are Yellow-breasted Flycatcher (about 10%) and Yellow-margined Flycatcher (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Gray-crowned Flycatcher is recorded against all the birds logged in Yasuní National Park (323 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.
