Cuculiformes

Note that, although in English smaller species tend to be called doves and bigger species pigeons, there is actually no scientific distinction between those common terms.

In addition to these clades, the neoaves include some orders that are often more difficult to place, such as the large terrestrial bustards, which appear to be closely related to the cuckoos of order Cuculiformes, which includes the European cuckoo, the roadrunners, kuas, and anis.

Many taxonomies consider them to share common ancestry with the turacos, or banana eaters, that also include the African go-away birds, so named for their distinctive calls.

A few other difficult-to-place orders include the hotzin, or stinkbird, noted for its numerous calls, apparent smell, and young that possess primitive claws on their wing digits.