Cockatoo (redirected from Cacatua)

cockatoo: see parrot.

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cockatoo

Sulfur-crested cockatoo (Cacatua galerita).

(credit: Warren Garst/Tom Stack & Associates)

Any of 21 species of crested parrots (family Cacatuidae), found in Australia and from New Guinea to the Solomon Islands. Most species are white with touches of red or yellow; some are black. All have a massive beak used to crack nuts, dig up roots, or pry grubs from wood; feeding is aided by a wormlike tongue. Treetop, hole-nesting birds, cockatoos at times form large, noisy flocks that damage crops. The largest cockatoo (the palm, or great black, cockatoo) is about 25–30 in. (65–75 cm) long. Some cockatoos live more than 50 years.

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cockatoo

any of various parrots of the genus Kakatoe and related genera, such as K. galerita (sulphur-crested cockatoo), of Australia and New Guinea. They have an erectile crest and most of them are light-coloured

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Cockatoo 

a bird of the subfamily Kakatoeinae of the family Psittacidae. The body measures 60– cm long. A characteristic feature is the crest on the head. Cockatoos are found from the islands of Kalimantan and Flores, the Philippines, and New Guinea to the Solomon Islands, Australia, and Tasmania. There are five genera: Probosciger, Calyptorhynchus, Callocephalon, Kakatoe, and Nymphicus. These genera comprise 17 species. The birds live in forests, often near fields, and stay in flocks. They eat fruits and seeds, and their powerful beaks are capable of cracking even the very hard fruits of palm trees. In some places cockatoos seriously damage crops. They build their nest in tree hollows or in fissures of cliffs. The large cockatoos lay two or three white

Table 1. Composition of coal tar
Fraction	Output (% of tar bulk)	Boiling point (°C)	Density at 20°C (kg per cu m)	Recoverable substances
Light…………	0.2–0.8	To 170	900–960	Benzene and its homologues
Phenol…………	1.7–2.0	170–210	1,000–1,010, 010	Phenols, pyridine bases
Naphthalene……	8.0–10.0	210–230	1,010–,1,020	Naphthalence, thionapthene
Heavy (absorbring)….	8.0–10.0	230–270	1,050–1,070	Methyl naphthalenes, acenaphthene
Anthracene……	20.0–25.0	270–360(and to 400)	1,080–1,130	Anthracene, phenanthrene, carbazole, others
Pitch………	50.0–65.0	Over 360	1,200–1,300	Pyrene and other highly condensed aromatic compounds

eggs; the small birds of the genus Nymphicus lay five or six eggs.Cockatoos are often kept in cages.