from Wiktionary, Creative Commons Attribution/Share-Alike License.
- proper noun A taxonomic
orderwithin the subclass neognathae— the turacos, cuckoosand hoatzin.
from Wiktionary, Creative Commons Attribution/Share-Alike License
I've seen a recent study based on osteology "behavior and ecology" which seems to agree with molecular studies on the paraphyletic and basal nature of terrestrial cuckoos, that arboreal cuckoos are derived and monophyletic, and that brood parasitism evolved twice in Cuculiformes.
Phylogenetic analysis of Cuculiformes (Aves) based on osteology, behavior and ecology: systematics and evolutionary implications.