Family Tyrant-flycatchers (Tyrannidae)

Least Concern

Northern Beardless Tyrannulet (Camptostoma imberbe)


French: Tyranneau imberbe German: Blasskleintyrann Spanish: Mosquerito imberbe

Camptostoma imberbe

P. L. Sclater

, 1857,

San Andrés Tuxtla, Veracruz, Mexico


Birds from S USA (Arizona) and NW Mexico, supposedly longer-billed, more olive above and more yellow below, described as race ridgwayi, and others, from Cozumel I, named as thyellophilum on basis of minute differences in mean culmen length (in small sample); both, however, considered indistinguishable from other populations. Monotypic.


S USA (S Arizona, S Texas) and Mexico (including Yucatán Peninsula and islands of Holbox and Cozumel) S to NW Costa Rica.

Descriptive notes

9·5–10·5 cm; c. 7 g. Pale, drab tyrannulet with slight crest. Plumage is pale greyish-olive above, crown slightly darker, lores and thin broken eyering whitish; wings... read more


Main call a thin but piercing whistle, “fleeeeer”, sometimes with thin terminal syllable, “fleeeeee... read more


Wide variety of semi-open habitats, including lowland scrub, riparian habitats, brushy savanna,... read more

Food and feeding

Arthropods; berries and small fruits eaten extensively where available. Forages mainly with active, parulid-style perch-gleaning, flitting... read more


Mar–Aug (to Sept during rainy years) in S USA and Mar–Jun in Middle America; often two broods. Nest bulky, globular, with side... read more


Populations in extreme N migratory, winter in S portion of breeding range.

Status and conservation

Not globally threatened. Rare to uncommon in N; more common in S. Overall population estimated at 2,000,000 birds. Survey data for USA suggest no apparent trend between 1966... read more

Recommended citation

Fitzpatrick, J. (2019). Northern Beardless Tyrannulet (Camptostoma imberbe). 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 14 November 2019).