Chestnut-backed Antbird (Poliocrania exsul) [XC694917]
by Scott Olmstead from Puerto Vargas Trail, Cahuita National Park, Lim\u00f3n, Costa Rica (song)
Chestnut-backed Antbird (Poliocrania exsul) [XC445405]
by Jerome Fischer from Anchicay\u00e1 Nature Camp, Colombia (song)
Subspecies
Genus appears not to represent a monophyletic grouping, but traditional arrangement maintained pending further phylogenetic study. Relationships uncertain. Plumage differences among some subspecies may reflect clinal variation.
The following 5 subspecies are recognised:
exsul Sclater, 1859 - Caribbean slope from Nicaragua south to western Panama (east to Canal region in Colón).
occidentalis (Cherrie, 1891) - Pacific slope in Costa Rica and western Panama (Chiriquí, Veraguas).
niglarus (Wetmore, 1962) - Eastern Panama (from Colón east of Canal, and Pacific slope in Panamá and north-western Darién) and adjacent extreme north-western Colombia (northern Chocó).
cassini (Ridgway, 1908) - Extreme south-eastern Panama (Darién south of Golfo de San Miguel) and northern Colombia (northern Chocó east to southern César and lower Magdalena Valley south to Bolívar). Considered by some authors to be a subspecies of Short-tailed Antbird (Poliocrania maculifer).
maculifer (Hellmayr, 1906) - Pacific slope in west-central and south-western Colombia (southern from central Chocó) and western Ecuador. Considered by some authors to be a subspecies of Short-tailed Antbird (Poliocrania maculifer).
BirdLife International Species Factsheet