Bence Mate / Montezuma oropendola (Psarocolius montezuma) hanging upside down as part of a courtship display. Costa Rica.

Bence Mate / Montezuma oropendola (Psarocolius montezuma) two interacting, Costa Rica.

Bence Mate / Montezuma oropendolas (Psarocolius montezuma) perched either side of Brown-hooded parrot (Pyrilia haematotis) in rain, Laguna del Lagarto, Santa Rita, Costa Rica

Mary McDonald / Montezuma's Oropendola (Psarocolius oropendola)perched on a Palm frond, calling, Arenal Observatory Lodge, Arenal Volcano, Costa Rica.

Melvin Grey / Crested oropendola (Psarocolius decumanus insularis) adult male in tropical rainstorm. Asa Wright, Trinidad.

Konrad Wothe / Amazonian oropendolas (Psarocolius yuracares) two perched, Panguana Reserve, Huanuca province, Amazon basin, Peru.

Mary McDonald / Montezuma's Oropendola (Psarocolius oropendola)perched on a Palm frond, calling, Arenal Observatory Lodge, Arenal Volcano, Costa Rica, Central America.

Stephen Dalton / Montezuma oropendola (Psalocorius montezuma) perched, Costa Rica

David Tipling / Montezuma Oropendola {Psaracolius / Gymnostinops montezuma} feeding in fruiting tree, Tikal, Guatemala

Hermann Brehm / Russet backed oropendola (Psarocolius angustifrons) perched on branch, South America

Patricio Robles Gil / Montezuma oropendola at nest {Gymnostinops montiezuma} Yucatan, Mexico

Robin Chittenden / Montezuma oropendola (Psarocolius / Gymnostinops montezuma) nests at the top of a very tall tree, Costa Rica, March