Citrine Warbler (Myiothlypis luteoviridis) [XC261096]
by Olaf Jahn from Napo: upper Cordillera de los Huacamayos, Ecuador (call, calls)
Citrine Warbler (Myiothlypis luteoviridis) [XC858847]
by Jacob Wijpkema from Chuspipata, La Paz, Bolivia (song)
Subspecies
Closely related to Pale-legged Warbler (Myiothlypis signata) and Black-crested Warbler (Myiothlypis nigrocristata). Subspecies eophrys formerly considered a subspecies of Black-crested Warbler (Myiothlypis nigrocristata), but closer in morphology to present species and linked to nominate subspecies by intermediate striaticeps. Subspecies richardsoni sometimes treated as a separate species, but linked to nominate by intermediate subspecies quindianus. A specimen from Colombia (at 3400 m) may represent an additional, undescribed, subspecies, apparently resembling nominate subspecies, but may be an undescribed subspecies of Pale-legged Warbler (Myiothlypis signata).
The following 5 subspecies are recognised:
richardsoni (Chapman, 1912) - Pacific slope of western Andes of Colombia.
quindiana Meyer de Schauensee, 1946 - Central Andes of Colombia (Caldas and Tolima).
luteoviridis (Bonaparte, 1845) - Eastern Andes from south-western Venezuela (Mérida) south to Ecuador.
striaticeps Cabanis, 1873 - Andes of northern and central Peru. Considered by some authors to be a distinct species, Peruvian Citrine Warbler (Myiothlypis striaticeps).
euophrys (Sclater, PL & Salvin, 1876) - Andes from southern Peru south to central Bolivia. Considered by some authors to be a distinct species, Bolivian Citrine Warbler (Myiothlypis euophrys).
BirdLife International Species Factsheet