Order
Cuculiformes
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121 species in this taxon
order of birds (Aves) Cuculiformes (Cuculiformes) is an order comprising closely related families of organisms. It contains 1 families with 121 known species. This includes the family groups Cuculidae. Among its members, 11 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Birds (Aves).