Wim van den Heever / Orange-backed troupial (Icterus croconotus) looking down off branch, Pantanal, Brazil.

Luiz Claudio Marigo / Orange-backed troupial (Icterus croconotus) perched, Pantanal, Mato Grosso, Brazil.

Ben Cranke / Orange-backed Troupial (Icterus croconotus) perched on a tree branch, Mato Grosso, Pantanal, Brazil. July.

Nick Garbutt / Orange-backed Troupial (Icterus croconotus) in bank-side vegetation on the edge of the Piquiri River, Pantanal, Brazil.

Luiz Claudio Marigo / Orange-backed Troupial / Oriole (Icterus croconotus) hanging from a branch. The Pantanal wetlands of Mato Grosso State, Brazil, November.

Bruce Thomson / Orange-backed troupial (Icterus croconotus) perching on branch, calling, Pocone, Brazil.

Bruce Thomson / Orange-backed troupial (Icterus croconotus) feeding in orange tree, Pocone, Brazil.

Francisco Marquez / Streak-backed oriole ( Icterus pustulatus graysonii ) subspecies that inhabits the Islas Marías, Marias Biosphere Reserve, Mexico