Family Tyrant-flycatchers (Tyrannidae)

Least Concern

Choco Tyrannulet (Zimmerius albigularis)


French: Tyranneau du Choco German: Chocókleintyrann Spanish: Mosquerito del Chocó

Tyranniscus chrysops albigularis


, 1924,

Esmeraldas, north-west Ecuador


Until recently, considered conspecific with Z. chrysops (and both formerly included in Z. viridiflavus), but daytime call a short whistle with an emphasized rise, differing from all other taxa in Z. chrysops in its brevity (score 3), pattern (lower maximum frequency; 3) and emphasis (higher maximum amplitude: ns[3]), and from Z. viridiflavus in its brevity (4) and pattern (different start and end frequencies; 4)#R; also differs in its whiter-grey, less yellow-washed throat (1); grey of breast extending more onto belly (1); marginally whiter lower belly (ns); and grey vs dark reddish iris, but some individual variation recorded (ns). Treatment as separate species supported by DNA evidence#R. Monotypic.

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

SW Colombia (Nariño) and W Ecuador (S to N Guayas).

Descriptive notes

10·5–11·5 cm; 6·6–8·6 g. A typical Zimmerius tyrannulet. Dark olive upperparts, with yellow-mottled forehead, yellow fringes to wing-coverts and remiges (except base... read more


Most frequently heard is daytime call: a short whistle ending terminating in an emphatic rise (but... read more


Occupies similar range of wooded habitats as Z. chrysops, including humid pre-montane... read more

Food and feeding

No known differences in diet or foraging behaviour from other closely related Zimmerius.


No information.


None known.

Status and conservation

Not globally threatened (Least Concern). Fairly common to common. Occurs in rather many protected areas, including, e.g., Machalilla National Park, Loma Alta Ecological... read more

Recommended citation

del Hoyo, J., Collar, N. & Kirwan, G.M. (2019). Choco Tyrannulet (Zimmerius albigularis). 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).