All members of the Order Psittaciformes
, with the exception of the budgerigar and the cockatiel, are afforded protection by an international treaty, the Convention on International Trade in Endangered Species (CITES).
Three hundred and seventy two species of parrots belong to order Psittaciformes
and many of these species are the members of family Psittacoidae (Iwaniuk et al.
psittaci can infect 465 avian species in 30 avian orders, with at least 153 species in the order Psittaciformes
Avian order Psittaciformes
(parrots) accounts for around 375 species in 86 genera (BirdLife International, 2013) They are commonly held in captivity, with over 20 000 parrots housed in Zoological Gardens and other animal holding facilities and millions more held in private hands (Young et al.
Hence, research studies are imperative given that the order Psittaciformes
is one of the most threatened bird orders worldwide.
Other than the order Psittaciformes
, air sac adenocarcinomas have been also reported in the orders of Columbiformes, Falconiformes, and Cuculiformes.