Yellow-olive Flatbill (Tolmomyias sulphurescens)

OTHER NAMES: N/A
Latin Etymology: Tolmomyias ("courageous flycatcher") sulphurescens ("sulphur yellow")

 

Yellow-olive Flatbill (Tolmomyias sulphurescens) at Tarcoles, Costa Rica - November 2025

Featured Subspecies: Tolmomyias sulphurescens cinereiceps
Weight: 14.5-15g  /  Length: 12.5-14cm  /  Wingspan: ?
NO UK STATUS / IUCN Red List: Least Concern

A widely distributed species found from the Yucatan to Argentina, mostly only absent from high mountain ranges in between. There is some suggestion it may be split it in the future due to the number and variation among the subspecies. It joins mixed species feeding flocks, but seemed to be more timid than other species found in that context.
 
Related Species: 
Order: Passeriformes
Family: Tyrannidae
Genus: Tolmomyias
SUBSPECIES: T. s. cinereiceps, T. s. flavoolivaceus, T. s. berlepschi, T. s. exortivus, T. s. asemus, T. s. confusus, T. s. duidae, T. s. aequatorialis, T. s. cherriei, T. s. peruvianus, T. s. insignis, T. s. mixtus,T. s. inornatus, T. s. pallescens, T. s. grisescens, T. s. sulphurescens

 
- Sighting Locations -

COSTA RICA - Spanish - Picoplano Sulfuroso
A widespread and fairly common species.
- COSTA RICA 2025 TRIP: Seen at Tarcoles 

Further Notes: BirdForum Opus, IUCN Red List, RSPB, Wikipedia, Xeno-canto