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Distribution

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Continent: Australia
Distribution: Australia (New South Wales, Queensland, South Australia, Victoria)
Type locality: Australia
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Eastern bearded dragon

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The eastern bearded dragon (Pogona barbata), also known as common bearded dragon or simply bearded lizard, is an agamid lizard found in wooded parts of Australia.[1][2][3] It is one of a group of species known commonly as bearded dragons. Other common names for this species include Jew lizard[1] and frilly lizard, the latter being a confusion between this and another dragon, the frill-necked lizard (Chlamydosaurus kingii). This species was originally described in 1829 by Georges Cuvier, who named it Amphibolurus barbatus.[4]

Description

P. barbata is one of the eight recognized species within the genus Pogona. Adult males can grow to about 60 cm (24 in) from the snout to the tip of the tail, while females may reach 50 cm (20 in) in overall length.

The head is large and triangular in shape. The throat is covered with spiny, dark grey scales which can be raised to form an impressive "beard". Several groups of even longer spiny scales are located at the back of the head, the corners of the mouth, the external ear openings, and running posteriorly along both sides of the abdomen. The thorax and abdomen are relatively slender and flattened dorsoventrally.

It is usually grey-black or red in skin colour and is sometimes reddish-brown, yellowish-brown, or dark brown. Juveniles are paler in colour than the adults and have patterns that fade as they mature. As the animal matures, it develops a subtle pale yellow, blue, or green tinge on the forepart of its head. If excited and at higher temperatures head, flanks and legs have a yellowish to orange colour. Usually however they are rather dark, from yellowish to grey and black. The inside of the mouth is generally a bright yellow colour.[5]

P. barbata resembles its close relative, the central bearded dragon, but may be distinguished from the latter by its less robust body and the row of spines along the lateral edge of the body, which continues over the forearm.[6]

Distribution and habitat

It is most common in eastern Australia south of Cape York Peninsula, but specimens have been collected from Cape York, through central Australia, and even from the west coast of Australia.

Ecology and behaviour

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Eastern bearded dragon displaying its beard on Christmas Creek Road, Lamington, Queensland

Eastern bearded dragons are diurnal. They are arboreal and perch on exposed places such as tree branches or logs, retreating to lower and cooler places when too hot. They are more aggressive than the central bearded dragon. The males are territorial and permit only females and juveniles in their territory. Dominant males are usually the biggest dragons and get the highest perches. Females tunnel into dry earth to lay a clutch of eggs.

When threatened, it inflates its throat and displays its beard. If further provoked, it opens its mouth to display the bright yellow colour of the lining of its mouth. In its close relative, the central bearded dragon; the lining of the mouth is of a reddish-pink hue. However the eastern bearded dragon will perform this beard display more often than its cousin.

Sex makeup

Recent observations concluded that hot temperatures were responsible for some of eastern bearded dragon lizards to change their sex makeup. Some lizards changed their male appearance to female, and have offspring, besides having the male ZZ chromosomes, of the genetic male lizards.[7]

Diet

The eastern bearded dragon feeds on a variety of small animals, including mice, smaller reptiles, and insects. In captivity, it also eats leaf vegetables such as clover and small flowers, fruits, and berries.

Gallery

References

  1. ^ a b c Hutchinson, M. (2018). "Pogona barbata". IUCN Red List of Threatened Species. 2018: e.T170419A83493237. doi:10.2305/IUCN.UK.2018-1.RLTS.T170419A83493237.en. Retrieved 19 November 2021.
  2. ^ a b Pogona barbata at the Reptarium.cz Reptile Database. Accessed 6 July 2020.
  3. ^ McAllister, C. T.; Upton, S. J.; Jacobson, E. R.; Kopit, W (1995). "A description of Isospora amphiboluri (Apicomplexa: Eimeriidae) from the inland bearded dragon, Pogona vitticeps (Sauria: Agamidae)". Journal of Parasitology. 81 (2): 281–284. doi:10.2307/3283934. JSTOR 3283934. PMID 7707208.
  4. ^ Worrell, Eric (1963). Reptiles of Australia. Angus & Robertson Ltd. p. 66.
  5. ^ "Eastern Bearded Dragon (Pogona barbata)". Lizards and Tuatara. Gland, Switzerland: World Association of Zoos and Aquariums. 2013. Archived from the original on 2016-06-26. Retrieved 2013-11-29.
  6. ^ Cogger, H.G., (1992). Reptiles and Amphibians of Australia, Reed Books, Chatswood, NSW, Australia. ISBN 0801427398
  7. ^ NBC (1 July 2015). "Hotter Temperatures Trigger Sex Change in Australian Lizards".

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Eastern bearded dragon: Brief Summary

provided by wikipedia EN

The eastern bearded dragon (Pogona barbata), also known as common bearded dragon or simply bearded lizard, is an agamid lizard found in wooded parts of Australia. It is one of a group of species known commonly as bearded dragons. Other common names for this species include Jew lizard and frilly lizard, the latter being a confusion between this and another dragon, the frill-necked lizard (Chlamydosaurus kingii). This species was originally described in 1829 by Georges Cuvier, who named it Amphibolurus barbatus.

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Pogona barbata

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Pogona barbata, le Dragon barbu de l'Est, est une espèce de sauriens de la famille des Agamidae[1].

Répartition

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Aire de répartition de l'espèce Pogona barbata selon l'UICN (consulté le 9 janvier 2013).

Cette espèce est endémique d'Australie[1]. Elle se rencontre au Queensland, en Nouvelle-Galles du Sud, au Victoria et en Australie-Méridionale.

Description

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Pogona barbata
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Pogona barbata

Il mesure une soixantaine de centimètres de long avec la queue, vingt-cinq sans la queue. Le corps est généralement gris mais il peut être quelquefois brun, allant du brun jaunâtre au brun foncé. Le ventre est blanc ou gris pâle. L'intérieur de la bouche est d'un jaune brillant. Le mâle adulte possède autour du cou des petites excroissances ressemblant à des poils qui sont à l'origine de son nom de « dragon barbu ». Il ressemble beaucoup à son cousin, Pogona vitticeps mais il s'en distingue par deux points : son corps est plus fuselé et surtout par les rangées d'épines qu'il a de part et d'autre du corps et qui continuent sur les pattes avant.

Mode de vie

C'est un animal assez sociable. Lorsqu'il se sent menacé, il va prendre une posture de défense en ouvrant sa gueule, redressant ses « poils » et gonflant son corps.

Alimentation

Il se nourrit d'insectes, de rongeurs et de fruits.

Reproduction

La femelle pond une trentaine d'œufs dans un terrier peu profond.

En captivité

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Pogona barbata

Pogona barbata est élevé en tant qu'animal de compagnie.

Publication originale

  • Cuvier, 1829 : Le Règne Animal distribué, d'après son organisation, pour servir de base à l'Histoire Naturelle des Animaux et d'introduction à l'Anatomie Comparé. Nouvelle Édition. Les Reptiles. Déterville, Paris, vol. 2, p. 1-406 (texte intégral)

Notes et références

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Pogona barbata: Brief Summary

provided by wikipedia FR

Pogona barbata, le Dragon barbu de l'Est, est une espèce de sauriens de la famille des Agamidae.

license
fr
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http://creativecommons.org/licenses/by-sa/3.0/
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wikipedia FR