Western woodhaunter
The western woodhaunter is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Colombia, Costa Rica, Ecuador, Honduras, Nicaragua, and Panama.
Taxonomy and systematics
At one time what is now the western woodhaunter was included in genus Hyloctistes but molecular phylogenetic studies showed that Hyloctistes is embedded within Automolus.Even before the generic merger, the western woodhaunter's taxonomy was unsettled, and it remains so. Its four subspecies were included with two others in what was then called the striped woodhaunter. In the early twenty-first century several authors split the four Central American and western South American subspecies from the striped woodhaunter and named the new species the western woodhaunter. They gave the remaining two subspecies the English name eastern woodhaunter and by the principle of priority retained the binomial A. subulatus for it. By late 2023 the International Ornithological Committee, BirdLife International's Handbook of the Birds of the World, and the Clements taxonomy adopted the split, though HBW calls A. subulatus the Amazonian woodhaunter. The North and South American Classification Committees of the American Ornithological Society have not adopted the split but both subcommittees note that some authors suggest it.
The four subspecies of the western woodhaunter are:A. v. nicaraguae A. v. virgatus A. v. assimilis von Berlepsch & Taczanowski, 1884
- ''A. v. cordobae''
Description
The western woodhaunter is long and weighs about. It is a fairly large member of its genus and has a shortish and heavy bill. The sexes have the same plumage. Adults of the nominate subspecies A. v. virgatus have a mostly dark brownish face with golden-buff streaks, a pale eyering and stripe behind the eye, and grizzled brownish and buff lores. Their crown is blackish brown with golden-buff streaks that widen as they extend onto the blackish brown back. Their rump is dull rusty olivaceous brown, their uppertail coverts deep reddish cinnamon, and their tail a lighter cinnamon than the uppertail coverts. Their wings are dull cinnamon brown with brownish black on the flight feathers. Their chin and throat are pale fawn with faint brownish feather edges. Their breast is a deeper fawn with dusky feather edges. Their belly, flanks, and undertail coverts are olivaceous brown. Their iris is brown, their bill brownish black with some yellow on the mandible, and their legs and feet brown. Subspecies A. v. nicaraguae has blackish brown upperparts and slightly lighter underparts than the nominate. A. v. assimilis has a more reddish brown back than the nominate, a darker chestnut-rufous rump, uppertail coverts, and tail, and a strong olivaceous wash on the breast. A. v. cordobae has an unstreaked back and nearly unmarked underparts.Distribution and habitat
The subspecies of the western woodhaunter are found thus:A. v. nicaraguae: southeastern Nicaragua with a few records in HondurasA. v. virgatus: Costa Rica into Panama as far as Veraguas ProvinceA. v. assimilis: from Eastern Panama south through western Colombia and most of the length of western EcuadorA. v. cordobae: northern Colombia's Córdoba, Antioquia, Bolívar, Santander, and Boyacá departmentsThe western woodhaunter inhabits humid forest and woodlands in foothills and the lower montane zone. In elevation it mostly occurs below, but locally reaches about in Costa Rica, Panama, and Ecuador.