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Difference between revisions of "Crested Goshawk" - BirdForum Opus

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;Accipiter trivirgatus
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[[Image:Crested_Goshawk.jpg|thumb|450px|right|Photo by {{user|Peter+Ericsson|Peter Ericsson}}<br />Khao Yai, [[Thailand]], March 2006]]
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[[Image:Crested_Goshawk.jpg|thumb|550px|right|Photo by Peter Ericsson <P>Photographed in Khao Yai, Thailand]]
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;[[:Category:Accipiter|Accipiter]] trivirgatus
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==Identification==
 
==Identification==
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This raptor has short broad wings and a long tail, both adaptations to manoeuvring through trees. It is 30-46cm in length, with the female much larger than the male. The larger size and a short crest are the best distinctions from its relative, the Besra, Accipiter virgatus.
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30–46 cm (11¾-18 in); female larger than male<br />
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Short broad wings and long tail<br />
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The male has a dark brown crown, grey head sides and black moustachial and throat stripes. The pale underparts are patterned with rufous streaks on the breast and bars on the belly.
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'''Male'''
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*Dark brown crown
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The larger female has a browner head and brown underpart streaks and bars. The juvenile has pale fringes to its head feathers, and the underpart background colour is buff rather than white.
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*Yellow eyes
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*Grey head sides
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*Dark moustachial and mesial stripes
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*Pale underparts has reddish breast streaks and bars on the belly<br />
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'''Female''': head sides are browner, and underparts streaks and bars are brown<br />
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'''Juvenile''': head feathers have pale fringes. Buff underparts. Grey eyes and lacks the dark mesial stripe
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====Similar Species====
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[[Image:20821266701 edb9577d98 b.jpg|thumb|350px|right|Female ssp ''indicus''<br />Photo by {{user|SeeToh|SeeToh}}<br /> Bishan Park, [[Singapore]], August 2015 ]]
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[[Besra]]: which is smaller and lacks the crest.
 
==Distribution==
 
==Distribution==
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Southern Asia: breeds in western India and Sri Lanka and from north-east India and the Himalayas east to south-central and southern China and Taiwan, south to the Malay Peninsula. Also occurs on Sumatra, Java, Borneo and the southern Philippine islands of Palawan, Negros, Leyte, Samar and Mindanao as well as numerous smaller islands. Resident.
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Southern [[Asia]]: breeds in western [[India]] and [[Sri Lanka]] and from north-east India and the Himalayas east to south-central and southern [[China]] and [[Taiwan]], south to the [[Malay Peninsula]]. Also occurs on [[Sumatra]], [[Java]], [[Borneo]] and the southern [[Philippines|Philippine]] islands of Palawan, Negros, Leyte, Samar and Mindanao as well as numerous smaller islands. Resident.
 
==Taxonomy==
 
==Taxonomy==
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The Crested Goshawk (Accipiter trivirgatus) is a bird of prey in the family Accipitridae which also includes many other diurnal raptors such as eagles, buzzards and harriers.
 
  
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''SUBSPECIES'' Ten-eleven races are usually recognised: peninsulae in western India, layardi in Sri Lanka, indicus from the Himalayas to China and south to Malaysia, formosae in Taiwan, trivirgatus in Sumatra, niasensis on Nias, javanicus in Java, microstictus in Borneo, palawanus in Palawan, castroi in the Polillo Islands and extimus in the southern Philippines.
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====Subspecies====
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[[Image:20191164624 6376a05803 b.jpg|thumb|350px|right|Juvenile in flight ssp ''indicus'' <br />Photo by {{user|SeeToh|SeeToh}}<br />Bishan Park, [[Singapore]], August 2015]]
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There are 11 subspecies<sup>[[#References|[1]]]</sup>:
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*''A. t. indicus'': [[India]] and [[Nepal]] to southern [[China]], [[Indochina]] and [[Malay Peninsula]]
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*''A. t. peninsulae'': South-western India
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*''A. t. layardi'': [[Sri Lanka]]
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*''A. t. formosae'': [[Taiwan]]
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*''A. t. trivirgatus'': [[Sumatra]]
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*''A. t. niasensis'': Nias Island (off western Sumatra)
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*''A. t. javanicus'': [[Java]] (vagrant to [[Bali]])
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*''A. t. microstictus'': [[Borneo]]
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*''A. t. palawanus'': South-western [[Philippines]] (Palawan and Calamianes)
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*''A. t. extimus'': South-eastern Philippine Islands
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*''A. t. castroi'': Polillo (off Luzon in northern Philippines)
 
==Habitat==
 
==Habitat==
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Lowland and hill forest up to about 2,000m.  
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Lowland and hill forest up to about 2,000 m.  
 
==Behaviour==
 
==Behaviour==
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The flight is a characteristic "slow flap, slow flap, straight glide" similar to other Accipiter species such as Northern Goshawk. Like its relatives, this secretive forest bird hunts birds, mammals and reptiles in woodland, relying on surprise as it flies from a perch to catch its prey unaware.
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====Flight Action====
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Typical goshawk action of flap, flap, glide. A woodland specialist which relies on surprise to ambush its prey.
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====Diet====
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[[Image:37781123364_dcf4cdd14e c.jpg|thumb|350px|right|Juvenile in flight ssp ''indicus'' <br />Photo by {{user|SeeToh|SeeToh}}<br />Henderson Waves, [[Singapore]], November 2017]]
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Their diet consists of large insects, small mammals, reptiles; such as lizards and frogs, and birds.
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====Vocalisation====
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Mostly quiet. Screams when defending nest. Call is a screamed ''he, he, hehehehe''
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==References==
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#{{Ref-Clements6thAug16}}#Handbook of the Birds of the World Alive (retrieved March 2016)
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#Wikipedia
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{{ref}}
 
==External Links==
 
==External Links==
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{{GSearch|Accipiter+trivirgatus}}
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<br />
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{{Video|Crested_Goshawk}}
  
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{{GSearch|Accipiter trivirgatus}}
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[[Category:Birds]] [[Category:Accipiter]] [[Category:Videos]]
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[[Category:Birds]]
 

Revision as of 06:26, 3 December 2017

Photo by Peter Ericsson
Khao Yai, Thailand, March 2006
Accipiter trivirgatus

Identification

30–46 cm (11¾-18 in); female larger than male
Short broad wings and long tail
Male

  • Dark brown crown
  • Yellow eyes
  • Grey head sides
  • Dark moustachial and mesial stripes
  • Pale underparts has reddish breast streaks and bars on the belly

Female: head sides are browner, and underparts streaks and bars are brown
Juvenile: head feathers have pale fringes. Buff underparts. Grey eyes and lacks the dark mesial stripe

Similar Species

Female ssp indicus
Photo by SeeToh
Bishan Park, Singapore, August 2015

Besra: which is smaller and lacks the crest.

Distribution

Southern Asia: breeds in western India and Sri Lanka and from north-east India and the Himalayas east to south-central and southern China and Taiwan, south to the Malay Peninsula. Also occurs on Sumatra, Java, Borneo and the southern Philippine islands of Palawan, Negros, Leyte, Samar and Mindanao as well as numerous smaller islands. Resident.

Taxonomy

Subspecies

Juvenile in flight ssp indicus
Photo by SeeToh
Bishan Park, Singapore, August 2015

There are 11 subspecies[1]:

  • A. t. indicus: India and Nepal to southern China, Indochina and Malay Peninsula
  • A. t. peninsulae: South-western India
  • A. t. layardi: Sri Lanka
  • A. t. formosae: Taiwan
  • A. t. trivirgatus: Sumatra
  • A. t. niasensis: Nias Island (off western Sumatra)
  • A. t. javanicus: Java (vagrant to Bali)
  • A. t. microstictus: Borneo
  • A. t. palawanus: South-western Philippines (Palawan and Calamianes)
  • A. t. extimus: South-eastern Philippine Islands
  • A. t. castroi: Polillo (off Luzon in northern Philippines)

Habitat

Lowland and hill forest up to about 2,000 m.

Behaviour

Flight Action

Typical goshawk action of flap, flap, glide. A woodland specialist which relies on surprise to ambush its prey.

Diet

Juvenile in flight ssp indicus
Photo by SeeToh
Henderson Waves, Singapore, November 2017

Their diet consists of large insects, small mammals, reptiles; such as lizards and frogs, and birds.

Vocalisation

Mostly quiet. Screams when defending nest. Call is a screamed he, he, hehehehe

References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2016. The eBird/Clements checklist of birds of the world: v2016, with updates to August 2016. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Handbook of the Birds of the World Alive (retrieved March 2016)
  3. Wikipedia

Recommended Citation

External Links


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