Crested Oropendola vs Montezuma Oropendola

In short

The Crested Oropendola and Montezuma Oropendola can be distinguished by their bill color and head markings. The Crested Oropendola has a mostly black plumage with a yellow tail, while the Montezuma Oropendola features a bicolored bill and a distinctive pale patch of bare skin on the sides of its head.

Identification tips

1. Look for the bicolored bill and pale facial skin patch on Montezuma Oropendola. 2. Note the chestnut rump and yellow tail on Crested Oropendola. 3. Observe behavior: Crested Oropendola colonies may have Giant Cowbirds present.

Size

Both species are large oropendolas, but there is no significant size difference noted between them.

Plumage

Crested Oropendola appears largely black with a chestnut rump and yellow tail. Montezuma Oropendola has yellow outer rectrices and a bicolored bill, with a pale patch of bare skin on the sides of the head.

Behaviour

Both species are social and often found in colonies. Crested Oropendola colonies are regularly attended by the parasitic Giant Cowbird.

Habitat

Crested Oropendola is found below 1000 m, but can be recorded up to 2600 m in Colombia. Montezuma Oropendola's specific habitat preferences are not detailed here.

Voice

Vocalizations are not detailed in the provided notes, but both species are known for their distinctive calls.