Black-billed Nightingale-Thrush (Catharus gracilirostris) [XC552515]
by Allen T. Chartier from Las Cataratas Lodge, Copey, Dota, Provincia de Cartago, Costa Rica (song)
Black-billed Nightingale-Thrush (Catharus gracilirostris) [XC271148]
by Peter Boesman from Sendero los Quetzales (Cerro Punta side), Panama (song)
Subspecies
The following 3 subspecies are recognised:
gracilirostris Salvin, 1865 - Costa Rica.
accentor Bangs, 1902 - Western Panama (western Chiriquí).
bensoni Griscom, 1924 - Eastern Chiriquí, in western Panama.