Large-billed Tern (Phaetusa simplex) [XC303141]
by Ricardo Jos\u00e9 Mitidieri from Laguna Pelegrino, Caquet\u00e0, Colombia (call)
Large-billed Tern (Phaetusa simplex) [XC415991]
by JAYRSON ARAUJO DE OLIVEIRA from Bom Jesus da Lapa, Bahia, Brazil (call)
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.