Chestnut-mandibled Toucan Identification Guide

Key Field Marks

• Large toucan with black body plumage and a bright yellow-orange throat and upper breast, bordered below by a band of red.
• Large bill with a mostly yellow-green upper mandible (maxilla) and a chestnut-brown lower mandible — the feature that gives the species its name and its most useful field mark.
• Bare blue skin around the eye.
• White patch on the rump, visible from behind or in flight.
• Often treated taxonomically as part of the Yellow-throated Toucan complex (Ramphastos ambiguus), alongside the very similar Black-mandibled Toucan of South America.

Similar Species

• Keel-billed Toucan: Overlaps in parts of Central America but shows a boldly multicolored bill (green, orange, red, and blue) rather than the simpler yellow-green-and-chestnut pattern of Chestnut-mandibled Toucan, and is somewhat smaller.
• Black-mandibled Toucan: Extremely similar and now often considered the same species (or a close South American counterpart); ranges are largely separated, with Chestnut-mandibled in Central America and Black-mandibled farther south in South America.
• Channel-billed Toucan: A different, smaller-billed South American species with a raised ridge on the culmen and a mostly black-and-pale bill lacking the chestnut lower mandible.

Habitat & Range

• Found in humid lowland and foothill forest, forest edge, and adjacent clearings from Honduras south through Costa Rica and Panama into northwestern Colombia and Ecuador.
• Ranges higher in elevation than some other lowland toucans, occurring well into foothill forest.

Behavior

• Frugivorous, plucking fruit with the long bill tip and tossing it back to swallow; also takes insects, eggs, and small vertebrates opportunistically.
• Usually seen in pairs or small groups moving through the canopy, hopping between branches and making short flights between trees.

Voice

• A loud, far-carrying, repeated yelping or croaking call, often described as sounding like "Dios te dé" ("God give you"), frequently heard at dawn and used to locate the species even before it is seen.