Family Typical Antbirds (Thamnophilidae)

Least Concern

Northern White-fringed Antwren (Formicivora intermedia)


French: Grisin intermédiaire German: Blassrücken-Ameisenfänger Spanish: Hormiguerito coicorita norteño

Formicivora intermedia


, 1847,

Cartagena (Colombia) and Aragua (Venezuela) = Aragua


Hitherto considered conspecific with F. grisea, but differs in its (in female) plain or dark-spotted whitish or pale buff vs plain cinnamon-rufous underparts (2); (in male) broader white supercilium (1); broader, whiter flanks (2); different song (although that of alticincta unknown), with much lower frequency (at least 2) and slower pace (at least 1), and with a seemingly unique call (a long whistle followed by a trill, documented to date for nominate, hondae and orenocensis)#R. Race fumosa perhaps indistinguishable from nominate. Six subspecies recognized.

What do (1) and (2) mean? Learn more about the scoring system.
Subspecies and Distribution
  • F. i. alticincta Bangs, 1902 – Pearl Is (off S Panama).
  • F. i. hondae (Chapman, 1914) – NW Colombia (Atlántico S to N Antioquia and Bolívar, S in Magdalena Valley to Huila).
  • F. i. fumosa (Cory, 1913) – along N base of Andes in NE Colombia (E Norte de Santander) and Venezuela (S Zulia and Trujillo S to Táchira).
  • F. i. intermedia Cabanis, 1847 – N Colombia (Magdalena, La Guajira, Cesar) and N Venezuela (N Zulia E to Sucre and Monagas, including Margarita I); also Chacachacare I, off Trinidad.
  • F. i. tobagensis Dalmas, 1900 – Tobago.
  • F. i. orenocensis Hellmayr, 1904 – S Venezuela (S of R Orinoco in N Bolívar and extreme N Amazonas; locally in S Anzoátegui, Delta Amacuro and E Monagas).
  • Descriptive notes

    12–13 cm, alticincta 11–12 cm; 8–12 g (nominate), 10·5–14 g (tobagensis). Adult male has smoky-brown upperparts, black wings with broad white bar and white... read more


    Loudsong is a slightly descending series of “juup, tu-du-du-du-du-du” notes or 2–5 soft, syncopated... read more


    Understorey and midstorey of a variety of wooded habitats, generally at edges; to 1600 m in... read more

    Food and feeding

    Feeds on variety of insects and spiders. Closely associated partners, individuals, or family groups forage mostly 0–5 m above ground, but... read more


    Season varies considerably across broad range: Apr–Oct in N Colombia, May–Sept in NC Venezuela, and Apr–Aug on Chacachacare I and Tobago.... read more


    Presumed resident throughout range.

    Status and conservation

    Not globally threatened (Least Concern). Uncommon to fairly common throughout most of its rather extensive range. Some large protected areas exist within regions inhabited by... read more

    Recommended citation

    del Hoyo, J., Collar, N. & Kirwan, G.M. (2020). Northern White-fringed Antwren (Formicivora intermedia). 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).