Ring parakeets
| Ring parakeets | ||||||||||||
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Barnard's Parakeet ( Barnard barnardi ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Barnardius | ||||||||||||
| Bonaparte , 1854 |
The ringed parakeets ( Barnardius ), also called collar parakeets , are a genus of the real parrots . The distribution area of this genus is limited to Australia.
Appearance
Ring parakeets are medium-sized parrots with a long and stepped tail. In contrast to the species of the flat-tailed parakeet genus , the dorsal plumage does not show any mottling due to feathers of different colors. In both the Barnard Parakeet and Bauer's Ring Parakeet , the blue cheek spots merge into the rest of the head plumage and are not sharply demarcated. Both types have a yellow neck band. The upper beak is strong. Females have somewhat narrower upper beaks, but this sexual dimorphism is not as pronounced as in the species of the species of the flat-tailed parakeet. Otherwise the sexual dimorphism is only very weak. The young birds resemble the adult birds. In young birds that have just fledged, however, the beak is still pale yellow, while adult ring parakeets have a grayish-white to grayish-horn-colored beak.
Distribution area and habitat
The Barnard Parakeet occurs in the interior of Eastern Australia from northwest Queensland to the northwest of the Australian state of Victoria and to the southeast of South Australia . Bauer's ring parakeet has a much larger range and is found in the south and west of Australia. Its eastern limit of distribution is the Flinders Range in South Australia.
Both types of ring parakeets are very well adapted to arid and semi-arid habitats. Bauer's ringed parakeet is a very adaptable species that colonizes a wide variety of habitats. It occurs in the dense coastal forests in the extreme southwest as well as in the agricultural Wheatbelt , in mallee areas , in semi-arid eucalyptus savannas, in arid acacia-casuarina bushland and in very sparsely overgrown desert regions. In arid regions, however, Bauer's ring parakeets are dependent on the fact that tree populations along watercourses can serve as breeding trees for them. Due to their adaptability, they are the most common species of the flat-tailed parakeet tribe in large parts of Western Australia. The Barnard Parakeet, on the other hand, is a bird of the so-called Mallee regions. The "scrubs and shrublands" (bushes and bush formations, MVG 14) consist of two to ten meters high eucalyptus bushes. The species known as Mallee have lignotuber and are multi-stemmed. There are around 200 species of Mallee eucalyptus. They form the driest eucalyptus communities and occur most frequently in areas with 200 to 350 mm (130 to 800) of rainfall, especially in Mediterranean climates with winter rain (zonobiom IV). Single-stemmed eucalyptus dominate when there is more rain, and acacias when there is less. Barnard's Parakeets occur in almost all regions with a Mallee population. They also inhabit tree savannahs, which are covered with eucalyptus and callitris trees. Agricultural zones are also populated by them if they have trees in their peripheral zone. They are also found in gallery forests .
Systematics
The position of the genus within the parrot system is controversial. The Barnard Parakeet is sometimes viewed as a subspecies of Bauer's Ring Parakeet. Other taxonomists do not see the classification in a separate genus as justified and assign (partly with the Barnard Parakeet as a subspecies of Bauer's Ring Parakeet, partly both species) to the flat- tailed parakeet in the narrower sense. Biochemical analyzes confirm a close relationship to both the flat- tailed parakeet and the blood-bellied parakeet . However, there are morphological differences in the structure of the ears which, according to ornithologist Joseph M. Forshaw, who specializes in Australian parrots, justify classification as an independent species.
species
- Barnard's Parakeet ( Barnardius barnardi )
- Bauer's ring parakeet ( Barnardius zonarius ), also just called the ring parakeet
supporting documents
Individual evidence
literature
- Joseph M. Forshaw : Australian Parrots. 1st German-language edition. Volume 2, Arndt-Verlag, Bretten 2003, ISBN 3-9808245-2-7 .
