Family Typical Antbirds (Thamnophilidae)

Critically Endangered

Alagoas Antwren (Myrmotherula snowi)


French: Myrmidon de Snow German: Alagoasameisenschlüpfer Spanish: Hormiguerito de Alagoas

Myrmotherula unicolor snowi

Teixeira and Gonzaga

, 1985,

Pedra Branca, Alagoas, Brazil


Formerly treated as conspecific with M. unicolor; also appears to be closely related to M. grisea and M. behni of Andes and N Amazonian mountains. The four have together been termed the “Plain-winged Myrmotherula group”; this is often combined with the “grey antwren assemblage” (see M. axillaris). Monotypic.


NE Brazil in Alagoas (Murici) and recently recorded in Pernambuco (Frei Caneca#R, Mata do Benedito#R and Mata do Estado#R).

Descriptive notes

10–10·5 cm; three birds 8–11·5 g. Male is grey, paler below; base of throat feathers black, tips grey. Differs from M. unicolor in longer,... read more


Loudsong a series of simple down­slurred notes of about even pitch (ca. 3·6 kHz),... read more


Understorey of semi-humid upland forest, at c. 550 m.

Food and feeding

Not well known. Feeds on insects, including orthopterans (Tettigoniidae) and lepidopteran larvae (greenish and whitish caterpillars); also... read more


Little known. Female with egg in oviduct on 9th Feb, and juveniles still in company of presumed parents recorded in May.


Presumed resident.

Status and conservation

CRITICALLY ENDANGERED. Restricted-range species: present in Atlantic Slope of Alagoas and Pernambuco EBA. Occupies a tiny range of less than 150 km² in north-east Brazil... read more

Recommended citation

Zimmer, K., Isler, M.L. & Sharpe, C.J. (2020). Alagoas Antwren (Myrmotherula snowi). 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 26 February 2020).