- Crotophaga major
- Sleek glossy blue-black plumage with green feather edges
- Black bill compressed with high-arched ridge at base of upper mandible
- White eye
Juveniles with brown iris.
This is a monotypic species.
Tropical evergreen forest, often near water. Also in mangroves and marshes. In the lowlands of Guianas also in villages.
Occurs from lowlands up to 800m, but mainly below 500m. Sometimes much higher (up to 2600m), probably on migration.
Feeds mainly on insects. Takes also small lizards, fruit, berries and seeds.
Forages in flocks on the ground and in the canopy. Follows groups of squirrel monkeys which flush insects, also sometimes follows army ants.
Breeding season May to December in Guyana, April to September in Suriname. A cooperative breeder, nesting in loose colonies.
The nest is a bulky mass made of sticks and green leaves. It's placed on branches over water. Clutch size 2 to 3 eggs in Panama, 4 to 5 in Argentina.
A resident species with some local movements.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2014. The eBird/Clements checklist of birds of the world: Version 6.9., with updates to August 2014. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- Del Hoyo, J, A Elliot, and J Sargatal, eds. 1997. Handbook of the Birds of the World. Volume 4: Sandgrouse to Cuckoos. Barcelona: Lynx Edicions. ISBN 978-8487334221
- BirdForum Opus contributors. (2021) Greater Ani. In: BirdForum, the forum for wild birds and birding. Retrieved 14 April 2021 from https://www.birdforum.net/wiki/Greater_Ani