Southern Mexico east of Isthmus of Tehuantepec (eastern Veracruz and eastern Oaxaca east to Yucatán Peninsula) south to western Panama (Chiriquí, Veraguas).
Eye-ringed Flatbill (Rhynchocyclus brevirostris) [XC274068]
by from La Selva biological station, Heredia, Costa Rica (call)
Eye-ringed Flatbill (Rhynchocyclus brevirostris) [XC374608]
by Peter Boesman from Monteverde Cloudforest Reserve, Puntarenas, Costa Rica (call)
Subspecies
Rhynchocyclus brevirostris (Sibley and Monroe 1990, 1993) has been split into Eye-ringed Flatbill (Rhynchocyclus brevirostris) and Pacific Flatbill (Rhynchocyclus pacificus) following SACC (2005).
Formerly considered conspecific with Pacific Flatbill (Rhynchocyclus pacificus).
The following 3 subspecies are recognised:
pallidus Binford, 1965 - Pacific slope of Oaxaca (Putla and Minitán east to Pluma Hidalgo), probably also in Guerrero, in southern Mexico.
brevirostris (Cabanis, 1847) - Southern Mexico east of Isthmus of Tehuantepec (eastern Veracruz and eastern Oaxaca east to Yucatán Peninsula) south to western Panama (Chiriquí, Veraguas).
hellmayri Griscom, 1932 - Mountains of eastern Panama and extreme north-western Colombia (Cerro Tacarcuna, in north-western Chocó).