Tyrant-flycatchers (Tyrannidae)

Yellow-olive Flycatcher (Tolmomyias sulphurescens) - HBW 9, p. 338

French: Platyrhynque jaune-olive German: Olivscheitel-Breitschnabeltyrann Spanish: Picoplano Sulfuroso
Other common names: Yellow-olive Flatbill

Taxonomy: Platyrhynchus sulphurescens Spix, 1825, Rio de Janeiro, Brazil.
Relationships within genus uncertain, pending completion of major genetic study. Taxonomy of present species requires further resolution; regional differences in voice, plumage and eye colour suggest to some authorities that races may represent more than one species; some plumage variation appears clinal, but clines are discordant; several races, particularly within South America, may not be valid. Sixteen subspecies tentatively recognized.

Subspecies and Distribution:

cinereiceps (P. L. Sclater, 1859) - S Mexico (Oaxaca and Veracruz E to Yucatán Peninsula) S to Costa Rica.
flavoolivaceus (Lawrence, 1863) - E Panama and NW Colombia.
asemus (Bangs, 1910) - W & C Colombia.

See all 16 subspecies

cinereiceps (P. L. Sclater, 1859) - S Mexico (Oaxaca and Veracruz E to Yucatán Peninsula) S to Costa Rica.
flavoolivaceus (Lawrence, 1863) - E Panama and NW Colombia.
asemus (Bangs, 1910) - W & C Colombia.
exortivus (Bangs, 1908) - NE Colombia and N Venezuela.
berlepschi (Hartert & Goodson, 1917) - Trinidad.
cherriei (Hartert & Goodson, 1917) - E Venezuela, the Guianas and N Brazil (upper R Branco and Amapá).
duidae J. T. Zimmer, 1939 - S Venezuela and NW Brazil (N Amazonas perhaps to W Pará).
confusus J. T. Zimmer, 1939 - SW Venezuela, E Colombia and NE Ecuador.
aequatorialis (Berlepsch & Taczanowski, 1884) - W Ecuador and NW Peru (Tumbes, Piura).
peruvianus (Taczanowski, 1875) - SE Ecuador and N & C Peru (Amazonas, S San Martín, E Pasco, Junín).
insignis J. T. Zimmer, 1939 - NE Peru (lower R Ucayali, in Loreto) and NW Brazil (R Juruá E to R Jamundá and R Madeira).
mixtus J. T. Zimmer, 1939 - NC Brazil (E Pará, NW Maranhão).
inornatus J. T. Zimmer, 1939 - SE Peru (N Puno).
pallescens (Hartert & Goodson, 1917) - C, S & E Brazil (S Maranhão, Piauí and Paraíba S to Mato Grosso, Bahia and possibly W Minas Gerais) S to Bolivia (Beni S to Tarija) and N Argentina (S to Tucumán).
grisescens (Chubb, 1910) - C Paraguay and N Argentina (E Chaco and Formosa, N Santa Fe).
sulphurescens (Spix, 1825) - E Paraguay, NE Argentina (Misiones) and SE Brazil (E Minas Gerais and Espírito Santo S to Rio Grande do Sul).