Chestnut-headed Oropendola

Montezuma Oropendola was by far the more common of the Oropendola that we observed however we were able to also see the Chestnut-Headed Oropendola. The Chestnut-headed Oropendola is a rather large, dark, yellow-tailed bird of humid evergreen forest and edge in tropical lowlands. Where present, colonies of large pendulous nests adorn tall trees.

It is often in flocks, usually in forest canopy at fruiting trees. The male is much larger than female, but sexes look similar, with a dark, rich brown head and body, blackish upperparts, pale yellowish bill, and bold yellow tail sides. eBird