Sulphur-crested cockatoo (Cacatua galerita)

source image from : species.wikimedia.org 

Relatively large body size and the presence of a yellow crested become the hallmark of this type of cockatoo.

Description and distribution
 Cockatoo species body size is around 30-52 cm. Body feathers are white with yellow colored crested. There are also yellow color under the wings and tail. Circle eyes pale blue or white, depending on race kakatuanya. Very loud shrill scream. Spread covers Maluku Islands region, Papua.

Child type
 This species has 4 races (subspecies). However, parrots are spreading in the Indonesian region is only 2 children type, ie medium sulfur-crested Cockatoo (C. g. eleonoralC. G. aruensis) and a large chef's cockatoo (C. g. triton) 

1. Parrot or cockatoo chef-mediumjambul medium-yellow (C. g. eleonoralC. G. aruensis).  The spread of this cockatoo covers the area around P. Aru and P. Kai. Cockatoo chef medium yellow-crested cockatoo is often called a medium size or medium. Size of wings between 26.1 to 29.2 cm and is the smallest race. Another distinctive feature of this cockatoo is her eyelids very pale blue.
2. a large chef's Cockatoo or parrot-yellow-besarjambul (Cg triton). The spread of a large chef parrots include the area around P. Papua. Cockatoo parrot is often called the great chef because he was larger than in C. g. Eleonora. Between 26.1 to 34.7 cm long wings. Light-blue eyelids. Two other subspecies found in Australia, namely C. g. galerita are spread around Australia and Cgfitzroyi which spread around northern Australia.

Population status
 In nature, chef cockatoo population showed a stable and relatively safe, which is carrying about 500,000 birds. In Indonesia, the erosion of chef cockatoo population due to habitat destruction in the form of upland forests (up to about 1,000 m above sea level), the murder because it was considered pest of maize, and were arrested illegally and arbitrarily to be traded as pets.As an effort to conserve, chef parrots designated as a protected bird since 1978 through a decree of Minister of Agriculture. 742/Kpts/Um/12/1978 and confirmed again by Government Regulation No. 7 / 1999. These birds, especially large size race (Cgtriton), has the ability to imitate sounds around it (bird pelatah) and has a funny behavior and tame toward humans