Northern white-fringed antwren

The northern white-fringed antwren (Formicivora intermedia) is an insectivorous bird in the antbird family Thamnophilidae. It is a resident breeder in tropical South America and occurs in northern Colombia, northern Venezuela and on the islands of Tobago and Margarita.

Northern white-fringed antwren

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Thamnophilidae
Genus: Formicivora
Species:
F. intermedia
Binomial name
Formicivora intermedia
(Cabanis, 1847)

Taxonomy

The German ornithologist Jean Cabanis described the northern white-fringed antwren in 1847 and coined its current binomial name Formicivora intermedia.[2] It was formerly considered conspecific with the southern white-fringed antwren (Formicivora grisea) but is now often treated as a separate species based on the difference in vocalization.[3][4]

There are six subspecies:[5]

  • F. i. alticincta Bangs, 1902 – Isla del Rey (Panama)
  • F. i. hondae (Chapman, 1914) – northwest Colombia
  • F. i. fumosa (Cory, 1913) – northeast Colombia and west Venezuela
  • F. i. intermedia Cabanis, 1847 – north Colombia and north Venezuela, Margarita Island (off Venezuela)
  • F. i. tobagensis Dalmas, 1900 – Tobago Island
  • F. i. orenocensis Hellmayr, 1904 – south central Venezuela

Description

The northern white-fringed antwren is 12–13 cm (4.7–5.1 in) long, and weighs 9–12 g (0.32–0.42 oz). The male of the nominate subspecies has grayish brown upperparts, a blackish tail and blackish wings with white spots on the coverts and a white bar. A white supercilium extends as a broad stripe down the side of the breast and body. The underparts are black. The female has upperparts similar to that of the male but the underparts are buff with darker spots or streaking on the breast.[6]

gollark: My logging setup: The logs are entirely public!
gollark: OW MY EYES
gollark: Which is annoying, since they *could* just run fibre from that box for stupidly high speeds, but noooo...
gollark: So do we, but it's VDSL over copper to some box which has fibre.
gollark: Wow. You somehow have worse interweb than I get in the UK. And the UK is known for awful e-netterweb connections.

References
  1. BirdLife International (2016). "Formicivora intermedia". IUCN Red List of Threatened Species. 2016. doi:10.2305/IUCN.UK.2016-3.RLTS.T103657347A104187461.en.
  2. Cabanis, Jean (1847). "Ornithologische notizen". Archiv für Naturgeschichte (in German). 13: 186–256 [225].
  3. Hilty, Steven L. (2002). Birds of Venezuela (2nd ed.). Princeton, New Jersey: Princeton University Press. p. 534. ISBN 978-0-691-09250-8.
  4. Boesman, Peter (April 2016). "Notes on the vocalizations of White-fringed Antwren (Formicivora grisea)". HBW Alive Ornithological Note 46. Retrieved 17 March 2018.
  5. Gill, Frank; Donsker, David, eds. (2018). "Antbirds". World Bird List Version 8.1. International Ornithologists' Union. Retrieved 16 March 2018.
  6. del Hoyo, J.; Collar, N.; Kirwan, G.M. (2018). del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). "Northern White-fringed Antwren (Formicivora intermedia)". Handbook of the Birds of the World Alive. Lynx Edicions. Retrieved 17 March 2018.
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