Northern White-fringed Antwren

The northern white-fringed antwren (Formicivora intermedia) is an insectivorous bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in mainland Colombia and Venezuela, on the Pearl Islands of Panama, and on the islands of Tobago and Margarita. == Taxonomy and systematics == The German ornithologist Jean Cabanis described the northern white-fringed antwren in 1847 and coined its current binomial name Formicivora intermedia. It and what is now the southern white-fringed antwren (F. grisea) were later considered conspecific as the white-fringed antwren, which retained the binomial F. grisea. Worldwide taxonomic systems separated them again based primarily on their very different vocalizations detailed in a 2016 publication, though the Clements taxonomy did not do so until 2023. The North and South American Classification Committees of the American Ornithological Society retain the single white-fringed antwren species, though the South American Committee is seeking a proposal to adopt the split. The northern white-fringed antwren has these six subspecies: F. i. alticincta Bangs F. i. hondae (Chapman, 1914) F. i. fumosa (Cory, 1913) F. i. intermedia Cabanis, 1847 F. i. tobagensis Dalmas, 1900 F. i. orenocensis Hellmayr, 1904 == Description == The northern white-fringed antwren is 12 to 13 cm (4.7…