AY Honors/Parrots and Cockatoos/Answer Key

2. Name two species of parrot that builds its nest in a termite mound and tell where each is found.

Golden-shouldered Parrot

Male and female Golden-shouldered Parrots in an aviary at the Queensland Museum

The Golden-shouldered Parrot (Psephotus chrysopterygius) is a rare bird of southern Cape York Peninsula, in Queensland, Australia. It measures 26 cm long and weighs between 54-56 g.

The Golden-shouldered Parrot lives in open forest, where it feeds on small grass seeds, principally those of firegrass. An important habitat requirement is the provision of terrestrial termite mounds, which the bird uses for nesting. This has led to the parrot also being known as the Antbed Parrot. They will preferentially seek out taller mounds (up to 2 m high), and will dig a burrow into them when the mound has been softened by the rains. A long tunnel is dug down into the mound, and capped off by a nesting chamber. The clutch size is between 3-6 eggs, which are incubated for 20 days. The mound regulates the temperature in the chamber, keeping it high enough that the eggs can be left unattended while the parents feed.

The Golden-shouldered Parrot is listed as endangered (CITES I). The species has a restricted range and suffers from a variety of threats, including predation by feral cats, tourist disturbance, and a change in burning regime in the grasslands upon whose seeds it depends. The wild population is around 3000 birds, with around 1500 held in captivity in Australia.

Also these

• Grey-cheeked Parakeets (Brotogeris pyrrhopterus)
• Green-rumped Parrotlet (Forpus paserinus)
• Orange-fronted Conure (Aratinga canicularis)

3. Where in Australia would you find each of the following and describe the natural diet of each.

a. Long Billed Corella

Long Billed Corella

Long Billed Corella range (in red)

The Long-billed Corella, Cacatua tenuirostris, is a cockatoo native to Australia. Species are mostly white, with a pink face and forehead. They also have faintly pink feathers on the breast and belly, and yellow on the underside of the wings and tail. The birds have a long white beak, which is used to dig for roots and seeds.

b. Great Palm Cockatoo

Great Palm Cackatoo

Range of the Great Palm Cackatoo (in red)

The Palm Cockatoo (Probosciger aterrimus) is distributed in rainforests and woodlands of New Guinea and northern Queensland, Australia. It measures around 55-60 cm in length and weighs between 500-1,000 g. It is a distinctive bird with a large crest and has one of the largest bills of any parrots (only the Hyacinth Macaw's is larger). The bill is unusual as the lower and upper mandibles do not meet for much of its length, allowing the tongue to hold a nut against the top mandible while the lower mandible works to open it.

c. Gang Gang Cockatoo

Gang-gang Cockatoo

Range of the Gang-gang Cockatoo (in red)

The Gang-gang Cockatoo, Callocephalon fimbriatum, is found in the cooler and wetter forests and woodlands of Australia, particularly alpine bushland. Mostly mild grey in colour with some lighter scalloping (more pronounced and buffish in females) the male has a red head and crest, while the female has a small fluffy grey crest. It ranges throughout south-eastern Australia and Tasmania. The Gang-gang Cockatoo is the faunal emblem of the Australian Capital Territory. It is easily identified by its distinctive call, which is described as resembling a creaky gate, or the sound of a cork being pulled from a bottle.

Gang-gang cockatoos eat fruits, and seem to have a particular weakness for Hawthorn berries (though Hawthorns are an introduced species, and not part of the cockatoo's natural diet).

References

• http://vtpb-www2.cvm.tamu.edu/brightsmith/Wild%20Parrots.htm