Aviceda subcristata Gould, 1838

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IUCN Red List Assessment:
Red List Category

LC
Least Concern

Red List Criteria

Version

3.1

Year Assessed

2009

Assessor/s

BirdLife International

Reviewer/s

Bird, J., Butchart, S.

Contributor/s

Justification

This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be moderately small to large, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

History

  • 2008
    Least Concern
  • 2004
    Least Concern
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author© International Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/106003328

Resembles most others in genus. Adult grey with crest and bold ventral barring, unmistakable within range.Female slightly larger than male. Juvenile brown, not grey, with bold face pattern and rufous patch on breast.

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorKaterina Tvardikova
Sourcehttp://pngbirds.myspecies.info/node/532

IUCN Red List Assessment:
Red List Category

LC
Least Concern

Red List Criteria

Version

3.1

Year Assessed

2009

Assessor/s

BirdLife International

Reviewer/s

Bird, J., Butchart, S.

Contributor/s

Justification

This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be moderately small to large, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

History

  • 2008
    Least Concern
  • 2004
    Least Concern
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author© International Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/106003328

Resembles most others in genus. Adult grey with crest and bold ventral barring, unmistakable within range.Female slightly larger than male. Juvenile brown, not grey, with bold face pattern and rufous patch on breast.

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorKaterina Tvardikova
Sourcehttp://pngbirds.myspecies.info/node/532

Pacific Baza:

The Pacific Baza, Aviceda subcristata, also known as the Crested Hawk, is a slender, medium-sized hawk with a distinctive crest. Its upperside is mainly dark brown, with a grey head and yellow eyes. It is conspicuously barred white and dark brown on the breast and on the underside of the tail and flight feathers. Females are slightly larger than males. It is found in coastal and subcoastal areas of northern and eastern Australia, Wallacea, New Guinea and adjacent islands.

Hunting and Prey

The Pacific Baza has a distinctive hunting behaviour. When potential food is spotted in the treetops from above, the Pacific Baza lifts its wings into a distinctive Vee shape and dives briskly into the canopy to devour its prey.

It feeds on stick insects (especially when breeding) as well as other large insects, tree frogs, lizards, small birds and fruit. It nests high in forest and woodland trees, with a clutch size of 2-4.


Immature, Kobble Ck, SE Queensland, Australia

References

  1. ^ BirdLife International (2004). Aviceda subcristata. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 28 Jan 2008. Database entry includes justification for why the species is of least concern
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Licensehttp://creativecommons.org/licenses/by-sa/3.0/
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Sourcehttp://en.wikipedia.org/w/index.php?title=Pacific_Baza&oldid=544593071

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorKaterina Tvardikova
Sourcehttp://pngbirds.myspecies.info/node/532

Pacific baza:

The Pacific baza (Aviceda subcristata) also known as the crested hawk, is a slender, medium-sized hawk with a distinctive crest. Its upperside is mainly dark brown, with a grey head and yellow eyes. It is conspicuously barred white and dark brown on the breast and on the underside of the tail and flight feathers. Females are slightly larger than males. It is found in coastal and subcoastal areas of northern and eastern Australia, Wallacea, New Guinea and adjacent islands.

Hunting and Prey[edit]

The Pacific baza has a distinctive hunting behaviour. When potential food is spotted in the treetops from above, the Pacific baza lifts its wings into a distinctive Vee shape and dives briskly into the canopy to devour its prey.

It feeds on stick insects (especially when breeding) as well as other large insects, tree frogs, lizards, small birds and fruit. It nests high in forest and woodland trees, with a clutch size of 2-4.


Immature, Kobble Ck, SE Queensland, Australia

References[edit]

  1. ^ BirdLife International (2012). "Aviceda subcristata". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013. 
Wikimedia Commons has media related to Aviceda subcristata.
Wikispecies has information related to: Aviceda subcristata

Licensehttp://creativecommons.org/licenses/by-sa/3.0/
Rights holder/AuthorWikipedia
Sourcehttp://en.wikipedia.org/w/index.php?title=Pacific_baza&oldid=642763058

Not Threatened.

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorKaterina Tvardikova
Sourcehttp://pngbirds.myspecies.info/node/532

Resembles most others in genus. Adult grey with crest and bold ventral barring, unmistakable within range.Female slightly larger than male. Juvenile brown, not grey, with bold face pattern and rufous patch on breast.

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorKaterina Tvardikova
Sourcehttp://pngbirds.myspecies.info/content/aviceda-subcristata

Subspecies and Distribution:

    * timorlauensis (A. B. Meyer, 1894) - islands off Sulawesi, Lesser Sundas. * pallida (Stresemann, 1913) - S Moluccas. * reinwardtii (Schlegel & S. Müller, 1841) - C Moluccas. * stresemanni (Siebers, 1930) - Buru (C Moluccas). * rufa (Schlegel, 1866) - N Moluccas. * waigeuensis Mayr, 1940 - Waigeo I. * obscura Junge, 1956 - Biak I. * stenozona (G. R. Gray, 1858) - W New Guinea, Aru Is. * megala (Stresemann, 1913) - E New Guinea. * coultasi Mayr, 1945 - Admiralty Is. * bismarckii (Sharpe, 1888) - Bismarck Archipelago. * gurneyi (Ramsay, 1882) - Solomon Is. * subcristata (Gould, 1838) - N & NE Australia.
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorKaterina Tvardikova
Sourcehttp://pngbirds.myspecies.info/node/532
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith