Family Typical Antbirds (Thamnophilidae)

Least Concern

Plain-throated Antwren (Isleria hauxwelli)


French: Myrmidon de Hauxwell German: Graubauch-Ameisenschlüpfer Spanish: Hormiguerito de Hauxwell

Formicivora hauxwelli

P. L. Sclater

, 1857,

Chamicuros, Loreto, Peru


Closely related to I. guttata. Race suffusa appears very similar to nominate and perhaps not separable from it#R. Proposed race clarior (C Brazil) appears to intergrade clinally with nominate and is merged into it. Three subspecies recognized.

Subspecies and Distribution
  • I. h. suffusa (J. T. Zimmer, 1932) – SE Colombia (from Meta S along base of Andes, E to E Vaupés), extreme NW Amazonian Brazil (W of R Japurá), E Ecuador and NE Peru (Loreto and Amazonas N of R Marañón).
  • I. h. hauxwelli (P. L. Sclater, 1857) – E Peru (S of R Amazon and R Marañón), SW & SC Amazonian Brazil (E to R Xingu in Pará, S to Acre and SW & N Mato Grosso) and NW & NE Bolivia (Pando, Beni, La Paz, NE Santa Cruz).
  • I. h. hellmayri (E. Snethlage, 1906) – E Amazonian Brazil (E of R Xingu in E Pará and W Maranhão).
  • Descriptive notes

    8·5–9·5 cm; 9–12 g. Tail short, making body appear disproportionately large. Male is mostly grey, paler below, throat whitish; white interscapular patch, white... read more


    Loudsong a long, countable series (e.g. 20 notes, 8·4 seconds; duration highly variable) in... read more


    Understorey of lowland evergreen forest (terra firme, várzea/igapó,... read more

    Food and feeding

    Feeds on insects and other arthropods; also, perhaps opportunistically, on small lizards. Analysis of stomach contents of nine Peruvian... read more


    Nests recorded in Nov–Feb in Brazil, but young fledglings seen in Apr–Aug in E (Belém); single nest in Oct in Ecuador. One nest... read more


    None recorded; presumed resident.

    Status and conservation

    Not globally threatened. Fairly common throughout its large range. This includes a number of large protected areas, such as Yasuní National Park, in Ecuador, Manu National... read more

    Recommended citation

    Zimmer, K. & Isler, M.L. (2020). Plain-throated Antwren (Isleria hauxwelli). 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 28 January 2020).