Tolmomyias poliocephalus
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~30% in a week ~60%
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 Tambopata National Reserve on a given day, based on 332 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 127th most-seen of the 550 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.
August
In that month about 20% of wildlife watchers report a Gray-crowned Flycatcher in Tambopata National Reserve on a given day, against under 5% in January and March–April, the lowest months. That is one of Tambopata National Reserve's driest months, with about 70 mm of rain against 420 mm in February.
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, Tambopata National Reserve ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Amacayacu National Natural Park (Colombia, about 10%) and Anavilhanas National Park (Brazil, about 10%).
GBIF citizen-science records
It is estimated from how often the Gray-crowned Flycatcher is recorded against all the birds logged in Tambopata National Reserve (332 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.
