Parrots of the World
Forshaw, Joseph M.
Parrots of the World: An Identification Guide
Illustrations by Knight, Frank
FORSHAW, Joseph M. and William T. COOPER
Vanished and Vanishing Parrots: Profiling Extinct and Endangered Species
Forshaw, Joseph M., Illustrated by Frank Knight
Lories and Lorikeets: 45 Years' Experience
The Birds of British Somaliland and the Gulf of Aden: Their Life Histories, Breeding Habits, and Egg
Archer, Sir Geoffrey and Eva M. Godman
Illustrations by Archibald Thorburn and Henrik Gronvold
A Natural History of Australian Parrots: A Tribute to William T. Cooper (1934-2015)
Joseph M Forshaw and William T. Cooper
Aviary Birds in Colour
Monk Parakeet: Birds of North America species account
Mark F. Spreyer & Enrique H. Bucher.
Carolina Parakeet: Birds of North America species account
N.F.R. Snyder and K. Russell.
Thick-billed Parrot: Birds of North America species account
N.F.R. Snyder, E.C. Enkerlin-Hoeflich, & M.A. Cruz-Nieto.
White-winged Parakeet and Yellow-chevroned Parakeet: Birds of North America species account