Other Scientific Names
Atlapetes brunneinucha [Sibley and Monroe (1990, 1993)], Atlapetes brunneinucha [Stotz et al. (1996)], Buarremon brunneinucha [BirdLife International (2004)]
Other Names (World)
Chestnut-capped Brush-Finch, Mexican Chestnut-capped Sparrow, Chestnut-capped Atlapetes, Plain-breasted Brush-finch (apertus), San Martin Brush-finch (apertus), Chestnut-capped Brushfinch
Chestnut-capped Brushfinch (Arremon brunneinucha) [XC782866]
by Isa\u00ed L\u00f3pez from Parque Natural Chicaque, Cundinamarca, Colombia (song)
Chestnut-capped Brushfinch (Arremon brunneinucha) [XC500124]
by Daniel Cadena (Colecci\u00f3n de Sonidos Ambientales - Instituto Humboldt) from Sevegre Lodge, San Gerardo de Dota, Costa Rica (song)
Subspecies
Often placed in genus Buarremon or Atlapetes.
Proposed subspecies nigrilatera, described from Cerro Baúl (Oaxaca), in southern Mexico, considered synonymous with suttoni.
The following 10 subspecies are recognised:
brunneinucha (Lafresnaye, 1839) - Eastern Mexico from San Luis Potosí and Veracruz south to north-eastern Oaxaca.
apertus (Wetmore, 1942) - Sierra de Tuxtla, in southern Veracruz (Mexico).
suttoni (Parkes, 1954) - Guerrero east to central Oaxaca, in southern Mexico.
macrourus (Parkes, 1954) - Chiapas (southern Mexico) and south-western Guatemala.
alleni (Parkes, 1954) - Honduras, northern El Salvador and western Nicaragua.
elsae (Parkes, 1954) - Costa Rica and western and central Panama.
frontalis Tschudi, 1844 - Extreme eastern Panama, Colombia, western and northern Venezuela (except in Falcón and Yaracuy), Ecuador (except western slope from south-western Chimborazo south to north-western Azuay) and Peru.
allinornatus (Phelps & Phelps Jr, 1949) - Sierra de San Luis (Falcón) and Sierra de Aroa (Yaracuy), in north-western Venezuela.
inornatus (Sclater, PL & Salvin, 1879) - South-central Ecuador from south-western Chimborazo south to north-western Azuay (vicinity of R Chimbo and R Chachan).
nigrilatera (Rowley, JS, 1968) - Mountains of southern Mexico (Oaxaca).