Family Typical Antbirds (Thamnophilidae)

Least Concern

Rio Suno Antwren (Myrmotherula sunensis)


French: Myrmidon du Suno German: Schwarzkehl-Ameisenschlüpfer Spanish: Hormiguerito del Suno

Myrmotherula sunensis


, 1925,

Río Suno, Napo, Ecuador


Often grouped with similarly plumaged species in the “grey antwren assemblage” (see M. axillaris). Close relationship to M. schisticolor and M. minor suggested by similarities in morphology, behaviour and vocalizations. Two subspecies recognized.

Subspecies and Distribution
  • M. s. sunensis Chapman, 1925 – SC Colombia (E slope of Andes in Meta#R and Putumayo) and Ecuador (Sucumbíos, Napo, Pastaza); specimen from “mouth of R Curaray” (Peru) may have originated from Ecuador.
  • M. s. yessupi J. Bond, 1950 – EC Peru (Huánuco, Pasco); also SW Amazonian Brazil (R Juruá but precise location uncertain, probably also R Javari).
  • Descriptive notes

    9 cm. Tail short. Male is grey, wings darker, throat and centre of upper breast black; concealed white interscapular patch, wing-coverts tipped white; underwing-coverts grey... read more


    Loudsong a series of 2–5 similar, evenly paced, somewhat long thin whistles (e.g. 4 notes, 1... read more


    Understorey and mid-storey of lowland and foothill evergreen forest and adjacent older second-... read more

    Food and feeding

    Not well known. Feeds on insects, probably also spiders. Forages in pairs, individually or in family groups, 1–7 m above ground (... read more


    Nothing known.


    Presumed resident.

    Status and conservation

    Not globally threatened. Apparently patchily distributed and uncommon to rare throughout its range. Known to occur in a few large, protected areas, e.g. Yasuní and Sumaco-... read more

    Recommended citation

    Zimmer, K. & Isler, M.L. (2020). Rio Suno Antwren (Myrmotherula sunensis). 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).