Large-billed Tern (Phaetusa simplex) [XC589897]
by JAYRSON ARAUJO DE OLIVEIRA from Finca San Jorge, Morelia\/Caquet\u00e1, Colombia (flight call)
Large-billed Tern (Phaetusa simplex) [XC615833]
by Guillermo Treboux from Ci\u00e9naga de Palagua,Puerto Boyaca, Boyaca, Colombia (song)
Subspecies
The following 2 subspecies are recognised:
simplex (Gmelin, 1789) - Eastern Colombia east to Trinidad, and south through Amazonia; western Ecuador.
chloropoda (Vieillot, 1819) - Basins of R Paraguay and R Paraná south-west to north-central Argentina (Santiago del Estero, very rarely Cordoba). Non-breeding visitor to Uruguay.