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The white cockatoo (Cacatua alba), also known as the umbrella cockatoo, is a medium-sized all-white cockatoo endemic to tropical rainforest on islands of Indonesia. When surprised, it extends a large and striking head crest , which has a semicircular shape (similar to an umbrella, hence the alternative name).
The little corella is a small white cockatoo growing to 35–41 cm (14–16 in) in length and weighs 370–630 g (13–22 oz), with a mean weight of 525 g (1.157 lb). [ 5 ] [ 6 ] It is similar in appearance to both the long-billed corella and the western corella , but the little corella is smaller, and unlike either of those species, it has ...
Muir's corella (Cacatua pastinator pastinator) is a stocky, medium-sized white cockatoo endemic to Western Australia. It was the threatened nominate subspecies of the western corella . [ 2 ] It was removed from the WA's threatened species list in November 2012 as a result of successful conservation efforts.
Sulawesi supports twelve endemic bird genera. Of all Indonesian endemic birds, about sixty-one species are threatened: thirty-seven species are listed as vulnerable , twenty-three are endangered and eleven species are listed as critical on the IUCN Red List of Threatened Species .
In Hong Kong, a feral population of yellow-crested cockatoos could be the last hope for the critically endangered species. Researcher Astrid Andersson is on a mission to safeguard the species and ...
Additionally 53 avian species (0.48% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN. [ 2 ]
The long-billed corella, also known as long-billed cockatoo or slender-billed corella [2] (Cacatua tenuirostris), is a cockatoo native to Australia, which is similar in appearance to the little corella. [3] This species is mostly white, with a reddish-pink face and forehead, and has a long, pale beak, which is used to dig for roots and seeds.
The northern subspecies, Butler's Corella (Cacatua pastinator butleri), are a smaller bird with adults 40–48 centimetres (16–19 in) in length and weighing up to 700 grams (25 oz). [11] The bill is a dullish grey white, the legs are dark grey and the upper mandible has a long tip. [13]