Courtship and MatingĪs part of the courtship behavior, the male ruffles his feathers, spreads his tail feathers, extends his wings, and erects his crest. Umbrella Cockatoos only breed once a year – usually between December and March, when vegetation growth is at its peak and food is readily available. The female also tends to have a smaller head and beak than male. Gender identification:īoth males and females have pale blue eye-rings, but males have dark brown eyes, while females have reddish eyes. There are some pale yellow / lemon colored feathers on the underside of the wings and tail, which flash when they fly. A lowered crest can indicate calmness, friendliness and general approachability.For those approaching a cockatoo -a raised crest may be a warning not to touch them – or else risk being bitten. A raised crest can indicate that a cockatoo is displaying for its mate defending its territory or its flock, calling its flock members or a cockatoo may be expressing curiosity, excitement, surprise, fear or frustration.When the crest is lowered, the feathers fold back over the head and the crest is hardly visible.Īs attractive as the cockatoo crests are, their major purpose is communication. The Umbrella Cockatoos and the Moluccan Cockatoos have the largest and fullest crests. The Umbrella Cockatoos was named for its broad, backward-bending crest, which open like an umbrella and fan out. Umbrella Cockatoos are large white parrots with brown / reddish or black eyes, dark grey beaks and legs.
(Arndt and Pittman, 2003 Juniper and Parr, 1998) Their wings measure between 9.84 – 12.2 inches or 25 to 31 cm. They average 18 inches or 46 cm in length. Umbrella Cockatoos are medium-sized cockatoos that weigh between 17 oz (480 g) up to 25 oz (700 g) – the average being 20 oz (565 g). There are some claims that some of them have lived to the ripe of age of 100, but this has not been verified. Umbrella Cockatoos can live over 40 years in captivity and 30 years in the wild. This gives it protection by making the trade of wild caught birds illegal. It is listed in Appendix 2 of the CITES list of protected species. It numbers in the wild have declined owing to habitat loss, hunting and illegal trapping for the cage-bird trade. Umbrella Cockatoos, like all the other species of cockatoos, are important for the dispersal of seeds - which has important consequences for the ecology and evolution of plants.Īlthough the umbrella cockatoo is not classified as an endangered species it is classified as vulnerable. They are particularly common along the edges of clearings and rivers. Within their natural range, they are found at elevations of 1,000 to 3,000 ft (300 to 900 m) in a variety of habitats, including forests and open woodland, mangroves, swamps and agricultural areas (where they are considered “pests” since they feed on the crop). (BirdLife International, 2001 Juniper and Parr, 1998) They are also found on the island of Obi and the nearby island of Bisa, but it is believed that they were introduced to these islands and are escaped pets. Specifically, they occur naturally on the islands of Bacan, Halmahera, Tidore, Kasiruta, Ternate, Kasiruta and Mandioli. Nest is in cavity in large forest tree.The Umbrella Cockatoo or White Cockatoo, Cacatua alba, is endemic to the islands of Central and Northern Moluccas (aka Maluku Islands) in Indonesia. Gathers in larger groups at dusk to roost.Ģ elliptical eggs, 41.0 x 31.0mm (1.6 x 1.2 in).Īpril-August. Spends most of its time in the forest canopy, seen in pairs or small groups. Are able to adjust to secondary growth.įorages on arboreal seeds and fruits birds observed bark-peeling and investigating epiphytes, suggesting that they may also eat insects.
Recent research indicates that rapid declines are predicted to increase in the future (Vetter 2009).įound on Halmahera, Bacan, Ternate, Tidore, Kasiruta and Mandiole Islands in N Moluccas, Indonesia.įound in lowland and hill forest up to 600m (1968 ft). Currently, both adults and young are taken for trade. Vertical box 12" x 12" x 36" (30.5cm x 30.5cm x 91.5cm).Īffected by trapping and rapid habitat loss. Mixture of small seeds: canary, oats, safflower spray millet, limited sunflower seed, dry, soaked or sprouted sprouted beans such as mung, peas corn on the cob, green leaves such as: Swiss chard, lettuce, dandelion, chickweed fresh vegetables such as: carrot, celery, zucchini, green beans, peas in the pod fresh fruit such as: apple, banana, orange, cactus fruits and others complete kibble, walnuts, hazelnuts, pecans, roasted peanuts.īird-safe chewables (fir, pine, elder, willow or sterilized pine cones), different sized perches, ladders, large link chains (durable plastic) swings, bathing using overhead misters or spray bottles, socialization. Walk-in aviary, minimum length 3m (9.8 ft).
0 kommentar(er)
