Ground parrot

The ground parrot (Pezoporus wallicus) of Australia is one of only four ground-dwelling parrots in the world, the others being its closest relatives, the extremely rare night parrot (Pezoporus occidentalis), the somewhat closely related Antipodes parakeet (Cyanoramphus unicolor), and the unrelated highly endangered kakapo (Strigops habroptilus)[3] from New Zealand.

Ground parrot
CITES Appendix I (CITES)[2]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Class: Aves
Order: Psittaciformes
Family: Psittaculidae
Genus: Pezoporus
Species:
P. wallicus
Binomial name
Pezoporus wallicus
(Kerr, 1792)

The colouration of the two Pezoporus species and the kakapo is similar – yellowish green with darker barring, somewhat reminiscent of the head and back of the wild-type budgerigar. This is not an indication of a true relationship, however, but either adaptation to a particular lifestyle or a feature retained from ancestral parrots; probably the latter as barred plumage is found all over the family, from the tiny tiger parrots to female cockatiels.

When disturbed, a ground parrot flies swiftly just above the ground before dropping back into the vegetation. The presence of the bird is often only revealed by its characteristic dusk and dawn call, a clear whistling sequence of notes which rise in pitch before fading. It is silent in flight.

The ground parrot (Pezoporus wallicus wallicus) occurs in fragmented populations near the coast in southern Queensland, New South Wales (NSW) and Victoria and is considered vulnerable on the schedules of the NSW Threatened Species Conservation Act. There are estimated to be 4000 breeding birds. It has become extinct in South Australia.[4]

The Tasmanian ground parrot (Pezoporus wallicus leachi) is not considered threatened at state level and is most common in south west Tasmania.[5]

Description
At Cooloolah NP, SE Queensland, Australia

Up to 30 cm long. Plumage grass green, each feather with black and yellow markings; narrow orange-red band to forehead; head, nape, upper back and breast green, each feather with black shaft marking; feathers of abdomen, thighs and under tail-coverts greenish yellow with black barring; under wing-coverts green; primary coverts green; flight-feathers green with pale stripe across them; underside of flight-feathers with pale yellow wing-stripe; upperside of tail-feathers green with yellowish striped markings, underside brownish; outer tail-feathers yellow with brownish-black striping; bill greyish brown to horn-colour; cere greyish pink; narrow periophthalmic ring pale grey; iris whitish yellow; longish feet greyish brown; claws not so curved as other parrots.

Immatures as adults, but with slightly duller plumage; orange-red band to forehead absent; head, nape, upper back and breast green, each feather with distinct black shaft markings; tail shorter; iris brown.

Distribution

Extreme southeast of Queensland to southwest Australia (scattered in small groups); Tasmania and some off-shore islands.

Habitat

Marshy coastal plain without trees, reed beds with low bushes, restricted to button grass areas; species may depend on naturally occurring fires allowing new growth and renewed settlement by the ground parrot.

Status

Only found in certain localities; threatened in parts of its range by cultivation of large coastal areas, but also foxes, cats and fire; alleged to have strong scent and therefore easily disturbed by dogs.

Breeding
A taxidermied ground parrot

Breeding period from September to January; (one record in March); nest consisted of an excavation in soil 15 cm to 18 cm across and 2 cm (0.75 ins) to 5 cm deep; usually well hidden under small bush or tussock hanging over nest to provide a form of hollow; mostly lined with leaves, grass stalks, fern and small twigs; clutch 3 to 4 eggs; incubation probably 21 days; chicks well camouflaged with thick greyish-black down and protected against cold periods; young remain in nest for two weeks approaching parents for food; fed three times daily; leave nest after three weeks at least disturbance; roost after 25 days outside under tussocks; cannot, however, fly at this point; egg measures 28.1 x 22.2 mm.

References
  1. BirdLife International (2016). "Pezoporus wallicus". IUCN Red List of Threatened Species. 2016: e.T22685226A93064751. doi:10.2305/IUCN.UK.2016-3.RLTS.T22685226A93064751.en. Retrieved 12 November 2021.
  2. "Appendices | CITES". cites.org. Retrieved 2022-01-14.
  3. David, N. & Gosselin, M. 2002. The grammatical gender of avian genera. Bulletin of the British Ornithologists' Club, 122: 257-282
  4. "Western Ground Parrot Project Archived 2006-08-22 at the Wayback Machine". Birds Australia Western Australia. Last modified 26 April 2008.
  5. " Archived 2011-03-30 at the Wayback Machine". Ground Parrot Pezeporus wallicus'.
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