The Psittaciformes comprise three main lineages: Strigopoidea, Psittac... - dofaq.co
parrot

The Psittaciformes comprise three main lineages: Strigopoidea, Psittac...

wikipedia - 30 Jul 2015
The Psittaciformes comprise three main lineages: Strigopoidea, Psittacoidea and Cacatuoidea. The Strigopoidea were considered part of the Psittacoidea, but recent studies place this group of New Zealand species at the base of the parrot tree next to the remaining members of the Psittacoidea, as well as all members of the Cacatuoidea. The Cacatuoidea are quite distinct, having a movable head crest, a different arrangement of the carotid arteries, a gall bladder, differences in the skull bones, and lack the D

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