Family New World Warblers (Parulidae)

Least Concern

Choco Warbler (Myiothlypis chlorophrys)


French: Paruline du Choco German: Chocówaldsänger Spanish: Reinita del Chocó

Basileuterus bivittatus chlorophrys


, 1907,

“Quito”, Ecuador


Until recently considered conspecific with M. chrysogaster, but differs in its broad green vs narrow yellow postocular supercilium (2); more heavily and contrastingly olive-washed flanks (1); shorter tail (effect size –2.67, but n=9 for present species, score 2); entirely different song, with many more notes and a much faster delivery (effect size 11.62, score 4), and much higher minimum frequency (effect size 7.04, score 3)#R. Monotypic.

What do (1) and (2) mean? Learn more about the scoring system.

Pacific slope of W Andes of Colombia (S from Risaralda) and W Ecuador (S to E Guayas).

Descriptive notes

12–13 cm. Adult is overall olive above, with a relatively dull head pattern, comprising a mostly pale olive supercilium, with yellow restricted to supraloral area and dull... read more


Song a fast and buzzing accelerating series of thin notes, transcribed as “t-t-t-t-t-tzzzzzzzzz”;... read more


Lowland rainforest and humid submontane forest and second growth with dense understorey; mainly... read more

Food and feeding

Probably feeds mainly, if not entirely, on invertebrates. Forages by gleaning mostly at middle levels in top of understorey and lower... read more


In SW Colombia, a pair and a single observed carrying nest material in early Oct and late Jan, respectively, and pair was seen feeding two... read more



Status and conservation

Not globally threatened (Least Concern). Restricted-range species: confined to the Chocó EBA. Fairly common to locally common in Ecuador. Range recently extended... read more

Recommended citation

del Hoyo, J., Collar, N. & Kirwan, G.M. (2019). Choco Warbler (Myiothlypis chlorophrys). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 7 December 2019).