Psittaciformesorder which contains parrots and their allies. Their family name, Cacatuidae, evolved from the Malaysian name for cockatoo, kakaktua. Species in this order are found in most warm and tropical regions. The greatest diversity of parrots is found in South America and Australasia. Characteristic features of parrots include a strong curved bill, an upright stance, and strong legs. Like woodpeckers, they have 2 toes pointing forward (digits 2, 3) and 2 toes pointing backward (digits 1, 4). Most parrots are predominantly green, with other bright colors. They generally exhibit little or no sexual dimorphism. The most important components of most parrots' diets are seeds, nuts, fruit, buds and other plant material. Almost all parrots nest in tree holes. They can be afflicted by psittacine beak and feather disease (PBFD). This viral infection causes feather loss and beak malformation and reduces the bird's overall immunity. Parrots are some of the most intelligent birds, and the ability of some parrot species to imitate human voices enhances their popularity as pets.
In addition to the cockatoo family Cacatuidae there is also the parrot family
Psittacoidea and the New Zealand parrot family
Strigopoidea.
All cockatoos have significant crests and curved bills. Thier plumage is generally dull: white, grey or black. Their crest, face, and or tail may have more striking colors. Most cockatoos are larger than true parrots. The cockatiel, which is a memeber of the cockatoo family, is an exception as it is quite small. Two of the cockatoo genera contail most of the family members. The five species iin Calyptorhynchus have mainly black plumage. Cacatua contains 11 species all of which have mainly white plumage. There are five more single species genera which brings the total family members to 21.
Cockatoos from genera Calyptorhynchus and Cacatua
Cockatoos, not including the cockatiel, are from 30 to 60 cm in length 300 to 950 grams in weight. Males and female do not differ in size or plumage. The mature cockatiel is can be as small as 29 cm long and 80 to 100 grams in weight. One difference the cockatoos have from true parrots is their erectile crest which is raised when they land or when they are aroused. Another difference is that parrots are brightly colored and the cockatoos are not.
Cockatoos eat seeds, fruit, tubers, insects, and flowers. They often feed in large flocks, particularly when ground-feeding. Cockatoos are monogamous and nest in tree hollows. Logging can thus adversely affect them, but some have adapted well to humans and are considered agricultural pests. Another threat to cockatoos is capture for pets. The most popular pet of the family is the cockatiel as it is the easiest to maintain. Fortunately, the conservation status of that species is Least Concern so aviculture does not threaten its survival.
The cockatoo bill is kept sharp by rasping the jaws together when resting. They dehusk seeds by moving the jaws sideways. The tongue holds the seed against the lower jaw while the upper jaw moves across the seed like a file. Cockatoos maintain their feathers with frequent preening throughout the day. They also preen other birds' feathers that are otherwise hard to get at. Molting occurs a period of time so that flight is not disturbed. For most cockatoo species, it takes about 6 months for all flight feathers to be replaced. For the black cockatoos it takes 2 years! From the human perspective, cockatoos do not have pleasing voices; their calls are loud and harsh. The calls are used for warnings, identification, and to keep cohesion of their group.
Cockatoos are social and gather to eat, roost, and travel together. Their flocks may number in the hundreds or even thousands. Flock size tends to be higher for species that live in open spaces. It is also related to weather conditions; in time of drought flock size increases. They nest in tree hollows and have 2 to 8 white eggs. Incubation takes 20 to 29 days and fledging takes another 5 to 11 weeks. In both case, the larger species take more time.
Most species of cockatoos have a stable population and not threatened by humanity. However, eight species are challenged because of habitat modification or distruction caused by humans. On the other hand, some species that prefer open habitats have benefited from habitat modification and thrived so much that they are considered pests due to damage of trees, grains, and fruits.
Genus
Cacatua
The cockatoos and corellas have white plumage that is tinged with pink or yellow in some species. All species have a crest, the size varying from species to species. When erect there is often yellow visible in the crest. They generally eat seeds, fruits, buds, and bulbs.
Cockatoo,_Blue-eyed Cacatua ophthalmica
Image by: 1)
Katerina_Tvardikova 2, 3) Christian Strobbe - Walsrode Bird Park, Germany 4) madlemurs
Cockatoo, Ducorps' Cacatua ducorpsii
Image by: 1)
Lori Riely 2)
Tony Morris - Guadalcanal 3)
Kathy Lewis
Cockatoo,_Philippine Cacatua haematuropygia
Image by: 1)
Jacobusmulder - Palawan, Philippines 2)
Palawan_Council_for_Sustainable_Development 3)
Loury_Cedric
Cockatoo,_Salmon-crested Cacatua moluccensis
Image by: 1)
Len_Charnoff 2)
Adilson Borszcz 3)
Len Charnoff
Cockatoo, Sulphur-crested Cacatua galerita
mage by: 1)
Dick Daniels -
Birds of Eden 2, 4) Dick - Sydney, Australia 3)
Sandy Cole -
Flamingo
Gardens in Florida
Cockatoo, White Cacatua alba
mage by: 1)
Valerie_Everett 2) Dick Daniels -
Jungle Island of Miami 3)
viajar24h 4)
Dick -
Sylvan Heights
Cockatoo, Yellow-Crested Cacatua sulphurea
mage by: 1)
Darren 2)
Snowmanradio
3)
Nicola Bonazzi - Sydney 4)
Dick Daniels -
Birds of Eden, South Africa
Corella,_Little Cacatua sanguinea
Image by: 1)
Geoff_Whalan 2) Brett Donald 3)
Gregory_Smith
Corella,_Long-billed Cacatua tenuirostris
Image by:
1)
Ron_Knight 2)
patrickkavanagh 3)
Melissa 4)
David_Jenkins
Corella, Tanimbar Cacatua goffiniana
Image by: 1)
Sam at www.photos8.com 2)
Lip Kee - Tanimbar Island, Indonesia 3)
Green_Baron - Varsity Park
Corella, Western Cacatua pastinator
Image by: 1)
Steve Wilson - Blackpool Zoo, London 2)
Steve Forsyth - Perth
Genus Callocephalon - 1 species
Cockatoo, Gang-gang Callocephalon fimbriatum
Image by:
1, 4) David Cook - Wamboin, NSW, Australia 2)
Martyman - Australian National Botanic Gardens 3
Peter_Shanks
1) Pair 2) Female 3, 4) Male
Genus Calyptorhynchus
These mainly black cockatoos are found in Australia.
Cockatoo, Glossy Black- Calyptorhynchus lathami
Image by:
1, 2) David Cook - Crowdy Bay National Park
3) Aviceda - Queensland
1) Pair 2) Female 3) Male
Cockatoo, Long-billed Black- Calyptorhynchus baudinii
Image by: 1)
Edward Lear 2, 3) Rick01 - Western Australia
1, 2) Female 3) Male
Cockatoo, Red-tailed Black- Calyptorhynchus banksii
Image by: 1)
gAbY 2) Laurie_Boyle 3)
Geoff_Whalan - AU 4)
Jean_and_Fred
1) Male left; female right
2) Female 3, 4) Male
Cockatoo, Short-billed Black- Calyptorhynchus latirostris
Image by:
1) Ralph Green - Perth
2, 3, 4) Laurie_Boyle
1, 2) Female 3, 4) Male
Cockatoo, Yellow-tailed Black Calyptorhynchus
funereus
Image by: 1)
JJ Harrison in Tasmania Australia
2)
David Cook - Wamboin, NSW, Australia 3)
Nik_Borrow - Tasmania 4)
birdsaspoetry
2) Male (via red eye-ring)
Genus Eolophus
- 1 species
Galah Eolophus roseicapilla
Image by: 1)
Dick Daniels - Australia 2)
Dick -
Jungle
Island of Miami 3)
Alexandre_Roux 4)
David Cook
1) Juvenile
Genus Lophochroa - 1 species
Cockatoo, Pink Lophochroa
leadbeateri
Image by: 1)
JJ_Harrison - New South Wales
2, 4) Nik_Borrow 3)
Dick
Daniels -
Sylvan
Heights
Genus Nymphicus - 1 species
Cockatiel Nymphicus hollandicus
Image by: 1)
Quimby 2)
Dick Daniels -
Birds of Eden 3)
Ken and Nyetta 4)
Jes
1) Pair
Genus Probosciger - 1 species
Cockatoo,_Palm Probosciger aterrimus
Image by:
1) Dick Daniels -
Jungle Island of Miami 2)
Arthur Chapman - Bird Park in Kuala
Lumpur 3)
Chris_Christner