Argentina, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guyana, Honduras, Nicaragua, Panama, Paraguay, Peru, Suriname, Venezuela.
Eastern Costa Rica, Panama and Colombia; east of Andes, from southern Venezuela and the Guianas south through eastern Ecuador, eastern Peru, eastern Bolivia and Brazil to Paraguay and extreme north-eastern Argentina.
 
Population
Estimated population is 50,000 - 100,000 (2010).
Green Ibis (Mesembrinibis cayennensis) [XC257339]
by Peter Boesman from Sucumb\u00edos: 'Sacha Lodge', n bank R\u00edo Napo, Ecuador (flight call, flight calls)
Green Ibis (Mesembrinibis cayennensis) [XC655061]
by Mauricio Cuellar Ramirez (@Birding.travel) from Inaj\u00e1, State of Paran\u00e1, Brazil (call, flight call, nocturnal flight call)