The Crotophaginae are a small

subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zo ...

, within the cuckoo family

Cuculidae Cuckoos are birds in the Cuculidae ( ) family, the sole taxon in the order Cuculiformes ( ). The cuckoo family includes the common or European cuckoo, roadrunners, koels, malkohas, couas, coucals, and anis. The coucals and anis are someti ...

, of four gregarious

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

species occurring in the

Americas The Americas, sometimes collectively called America, are a landmass comprising the totality of North America and South America.''Webster's New World College Dictionary'', 2010 by Wiley Publishing, Inc., Cleveland, Ohio. When viewed as a sing ...

. They were previously classified as a family Crotophagidae. The subfamily is notable for the development of

cooperative breeding Cooperative breeding is a social system characterized by alloparental care: offspring receive care not only from their parents, but also from additional group members, often called helpers. Cooperative breeding encompasses a wide variety of group s ...

where several females lay eggs in a communal nest. It contains the three anis and the guira cuckoo. Among the anis, there is considerable variation in nesting habits. One species, The greater ani (''Crotophaga major'') lays 2 or 3 eggs, while the groove-billed ani (''C. sulcirostris'') lays seven. However the smooth-billed ani (''C. ani'') will share one nest between several females, with up to 29 eggs in one nest. Incubation takes 15 days for this species.

Systematics

Four species make up the subfamily, namely the guira cuckoo (''Guira guira'') and the three members of the genus ''Crotophaga'' known as anis. Study of the

cranial Standard anatomical terms of location are used to describe unambiguously the anatomy of humans and other animals. The terms, typically derived from Latin or Greek language, Greek roots, describe something in its standard anatomical position. Thi ...

osteology Osteology () is the scientific study of bones, practiced by osteologists . A subdiscipline of anatomy, anthropology, archaeology and paleontology, osteology is the detailed study of the structure of bones, skeletal elements, teeth, microbone mo ...

and

mitochondrial DNA Mitochondrial DNA (mtDNA and mDNA) is the DNA located in the mitochondrion, mitochondria organelles in a eukaryotic cell that converts chemical energy from food into adenosine triphosphate (ATP). Mitochondrial DNA is a small portion of the D ...

yield the same

phylogeny A phylogenetic tree or phylogeny is a graphical representation which shows the evolutionary history between a set of species or Taxon, taxa during a specific time.Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, M ...

, namely that the Smooth-billed and groove-billed ani are each other's closest relatives, with the greater ani related and the guira cuckoo an earlier offshoot of the group.

Distribution and habitat

The members of the family range from Florida in the north, through Central America and the West Indies and through South America south to Rio Negro in Argentina, in open habitats.

References

Bird subfamilies * {{Cuculiformes-stub