- Prahran, Victoria:
Black ****atoo Press. pp. 156–7. ISBN 978-0-9588106-0-9.
Kalhagen, Alyson. "Galah (Rose-Breasted) ****atoo: Bird
Species Profile". The Spruce...
- 66 (1B): 381–82. doi:10.1590/S1519-69842006000200021. PMID 16710531.
Kalhagen, Alyson. "Hyacinth Macaws". Pet Birds. About.com.
Archived from the original...
- PeerJ. 6:e5669: e5669. doi:10.7717/peerj.5669. PMC 6214232. PMID 30397538.
Kalhagen, Alyson. "White-Fronted (White-Browed)
Amazon Parrots: Bird
Species Profile"...
- neotropical.birds.cornell.edu. doi:10.2173/bow.bkhpar.01.
Retrieved 2018-03-13.
Kalhagen, Alyson. "Black-hooded
parakeet (Nanday conure)". The
Spruce Pets. Bird...
-
Parrot Encyclopedia".
World Parrot Trust.
Retrieved 27
December 2020.
Kalhagen, Alyson. "Green-ch****ed
Amazon Parrots". The Spruce.
Retrieved 25 February...
- Australia".
Australian Field Ornithology. 37: 48–55. doi:10.20938/afo37048055.
Kalhagen,
Alyson (2020). "Slender-Billed ****atoo Are One of the Best Pet Birds"...
-
behavior has also been
observed in
domestic chickens and woodpigeons.
Kalhagen, Alyson. "What Is Bird Eye Pinning?". The
Spruce Pets.
Retrieved 27 December...
- Scricciolo.
Archived from the
original on 10 June 2011.
Retrieved 11 June 2010.
Kalhagen, Alyson. "Goffin's ****atoo: Bird
Species Profile". The
Spruce Pets. Retrieved...
-
Aviary Birds. London, England:
Hermes House. p. 237. ISBN 1-84309-164-X.
Kalhagen, Alyson. "Hahn's
Macaw (Red-Shouldered Macaw): Bird
Species Profile". The...
- Parrot, Blue-crowned
Mealy Amazon".
Animal World.
Retrieved 8
August 2021.
Kalhagen, Alyson. "Mealy
Amazon Parrot: Bird
Species Profile". The
Spruce Pets....
