Orange-bellied parrot

The Orange-bellied parrot (Neophema chrysogaster), also known by names such as the orange-breasted parrot, is a small, critically endangered parrot native to southern Australia. It holds the distinction of being one of only three parrot species that undertake migration. The species was first scientifically described by John Latham in 1790 and is noted for its striking plumage, particularly in adult males.

Description and Characteristics

Adult Orange-bellied parrots measure approximately 20 cm (8 inches) in length. They exhibit clear sexual dimorphism. The adult male is characterized by bright grass-green upperparts, yellow underparts, and a prominent orange patch on its belly. Both sexes and juveniles share a distinctive two-toned blue frontal band and blue outer wing feathers. Females and juveniles are generally duller green, with the female's orange belly patch being smaller and less distinct. The species' scientific name, chrysogaster, derives from Greek words meaning "golden belly," referencing this characteristic.

Distribution and Habitat

The Orange-bellied parrot is endemic to southern Australia, with its entire breeding population found solely in southwestern Tasmania. Here, they nest in eucalypt trees bordering button grass moors, typically within 30 km of the coast. Following the breeding season, the entire population migrates across Bass Strait to winter along the coast of southeastern mainland Australia. Their preferred wintering habitats are estuaries and lagoons containing salt marsh, where they forage on saltmarsh species, beach and dune plants, and various exotic weed species.

Diet

In their natural habitat, Orange-bellied parrots feed on a diet primarily consisting of seeds and berries from small coastal grasses and shrubs. Important food plants include beaded glasswort and shrubby glasswort, along with seeds from species like coast fescue and saltbush, and berries from plants such as Coprosma. They have also been observed consuming kelp.

Behaviour and Breeding

Orange-bellied parrots are generally monogamous in the wild, though captive males may mate with multiple females. Pairs may form either on the mainland before migration or upon arrival in Tasmania. Breeding is confined to southwestern Tasmania, with the season running from November to February. They nest in tree hollows, typically in mature eucalypts, with nests being cleaned by the female who then lays 3 to 6 white eggs at two-day intervals. The incubation period lasts 21–24 days, and the young fledge at 4–5 weeks old. The species is known to utter a single-note buzzing contact call, an alarm call described as a quickly repeated 'tzeet', and a gurgle-buzz call used by sentries.

Conservation Status and Threats

Regrettably, the Orange-bellied parrot is classified as critically endangered by the IUCN, with wild populations having fallen to alarmingly low numbers, though recent efforts have shown some recovery. Historically, its range has contracted due to habitat loss and degradation. Major threats include fragmentation and degradation of overwintering habitat, competition with introduced species, abandonment of breeding habitat due to altered fire regimes, and risks associated with a small population size, such as loss of genetic diversity, inbreeding, and stochastic environmental events. Introduced predators, disease, and disorientation from artificial lights during migration also pose threats. Intensive conservation programs, including captive breeding and reintroduction efforts, are underway to secure the future of this unique migratory parrot.