Showing posts with label goshawk. Show all posts
Showing posts with label goshawk. Show all posts

Northern goshawk

   ›      ›   Northern goshawk - Accipiter gentilis.

The northern goshawk (Accipiter gentilis) belongs to the family Accipitridae. These northern goshawk species are distributed in North America, Asia and Europe.

Taxonomy of Northern goshawk

  • Scientific Name: Accipiter gentilis
  • Common Name: Northern goshawk
  • French: Autour des palombes; German: Habicht; Spanish: Azor común;
  • Other names: Falco gentilis Linnaeus, 1758;
  • Family: Accipitridae › Accipitriformes › Aves › Chordata › Animalia
  • Species author: (Linnaeus, 1758)
Accipiter gentilis was earlier included in the genus Falco. It is closely related to A. henstii and A. melanoleucus. The ten recognized subspecies are: A. g. buteoides (Menzbier, 1882), A. g. albidus (Menzbier, 1882), A. g. gentilis (Linnaeus, 1758), A. g. schvedowi (Menzbier, 1882), A. g. fujiyamae (Swann & E. J. O. Hartert, 1923), A. g. arrigonii (Kleinschmidt, 1903), A. g. marginatus Piller & Mitterpacher, 1783, A. g. atricapillus (A. Wilson, 1812), A. g. laingi (Taverner, 1940) and A. g. apache van Rossem, 1938.

Indian birds - Image of Northern goshawk - Accipiter gentilis
Indian birds - Image of Northern goshawk - Accipiter gentilis

Description

The northern goshawk is a medium sized bird of prey, measuring 45 to 65 cm in length and weighing 500 to 1,100 grams. The female goshawk is slightly larger and weighs 800 to 2,200 grams. These birds have short, broad wings and long tail. They are blue-grey above and are grey or white below. The chest and belly are barred. Adult goshawk have a white eye stripe. There are minor variations among the goshawk subspecies in eye color and level of grey or white coloration. Their call is a loud "kek-kek-kek" sound.

Habitat

The northern goshawk species inhabit mature, deciduous and coniferous forests, preferring areas near clearings and the forest edge.

Feeding habits

The northern goshawk prey upon birds, small mammals and reptiles. They surprise the prey by diving and attacking the prey.

Breeding

The northern goshawk breeding season is from early April to early June. A breeding pair will mate for life. The nest is built on a large, old tree. The nest is built with twigs and is lined with leafy twigs. A clutch may have up to five eggs. The female goshawk incubates the eggs and the male hunts and feeds the female and the chicks.

Distribution

The northern goshawk is distributed in the temperate parts of the Northern Hemisphere including North America, Europe and Asia.

Movement Patterns

The northern goshawks are mostly sedentary in their habitats. The northernmost populations may move southwards during September and November and return in March and April.

Status and conservation

The northern goshawk global population is estimated to number more than 500,000 individual birds. These species of goshawks have an extremely large range and population and are considered least vulnerable. Persecution, deforestation, poisoning from pesticides and habitat loss are the main threat to the survival of these species.

The IUCN (International Union for Conservation of Nature) has categorized and evaluated these goshawk species and has listed them as of "Least Concern".

Biological classification of Accipiter gentilis
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Accipitriformes
Family:Accipitridae
Subfamily:-
Genus:Accipiter
Species:A. gentilis
Binomial name:Accipiter gentilis
Distribution:Europe, Asia, Indian subcontinent and North America;
Feeding habits:small birds, small mammals, lizards and insects;
IUCN status listing:
Least Concern

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Image source: https://commons.wikimedia.org/wiki/File:Northern_Goshawk_ad_M2.jpg
Image author: Norbert Kenntner | License: CC BY-SA 3.0
Current topic in Birds of India: Northern goshawk - Accipiter gentilis.
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Shikra

   ›      ›   Shikra - Accipiter badius.

The Shikra (Accipiter badius) belongs to the family Accipitridae.
These Shikra species are distributed in Indian subcontinent, South China, Southeast Asia, Indonesia, West Asia, Middle East nations and Africa.

Taxonomy of Shikra

  • Scientific Name: Accipiter badius
  • Common Name: Shikra
  • French: Épervier shikra; German: Schikrasperber; Spanish: Gavilán chikra;
  • Other names: Falco badius J. F. Gmelin, 1788; little banded goshawk;
  • Family: Accipitridae › Accipitriformes › Aves › Chordata › Animalia
  • Species author: Gmelin, 1788
Accipiter badius was earlier included in the genus Falco. It is closely related to A. brevipes. The six recognized subspecies are: A. b. sphenurus (Rüppell, 1836), A. b. polyzonoides A. Smith, 1838, A. b. cenchroides (Severtsov, 1873), A. b. dussumieri (Temminck, 1824), A. b. badius (J. F. Gmelin, 1788) and A. b. poliopsis (A. O. Hume, 1874).

Description

The Shikra is a small goshawk, measuring 25 to 45 cm in length and weighing 100 to 200 grams.

The female shikra is larger than the male and weighs 130 to 260 grams. The wingspan is 50 to 70 cm. The shikra has short rounded wings and a narrow and long tail. The underside is white with fine rufous bars. The upper parts are grey. The lower belly has fewer bars and the thighs are white.

The wingtips are black and the central tail feathers have a dark terminal band. The male shikra have red iris and females have yellow-orange iris. The female shikra have brownish upper parts and the heavier barring on the underparts. Their call is a 'pee-wee' and sharper 'kik-ki ... kik-ki' sound.
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Photos
Indian birds - Image of Shikra - Accipiter badius
Indian birds - Image of Shikra - Accipiter badius

Habitat

The Shikra inhabits a range of habitats including forests, deciduous woodland, plains, farmlands, savanna, arid steppe and urban areas.

Feeding habits

The Shikra species feed on reptiles, small mammals, small birds, frogs and insects.

Breeding

The Shikra species breeding season is from March to June. The nest is constructed on trees with twigs as a platform and is lined with grass. Both the partners take part in nest building. The usual clutch is 3 to 4 eggs.

Distribution

The Shikra subspecies A. b. sphenurus is distributed in Africa and Middle East. The subspecies A. b. polyzonoides is distributed in Africa. The subspecies A. b. cenchroides is distributed in West Asia and Indian subcontinent.

The subspecies A. b. dussumieri is distributed in Indian subcontinent. The subspecies A. b. badius is distributed in Southwest India and Sri Lanka. The subspecies A. b. poliopsis is distributed in Myanmar, South China, Thailand, Vietnam and Indonesia.

Movement Patterns

The Shikra population in the Indian subcontinent appears to be sedentary. Other northern populations migrate southwards for wintering.

Status and conservation

The Shikra has an extremely large range and considered least vulnerable. It is common in its range and the global population is not quantified. The loss of trees in the savanna and changes in the habitat brought about by human activities are the main threats to the survival of these bird species.

The IUCN (International Union for Conservation of Nature) has categorized and evaluated these Shikra species and has listed them as "Least Concern".

Biological classification of Accipiter badius
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Accipitriformes
Family:Accipitridae
Subfamily:-
Genus:Accipiter
Species:A. badius
Binomial name:Accipiter badius
Distribution:Indian subcontinent, South China, Southeast Asia, Indonesia, Africa and Middle East nations and West Asia;
Feeding habits:lizards, small mammals, frogs, large insects and birds;
IUCN status listing:
Least Concern

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Image source: https://en.wikipedia.org/wiki/File:Shikra_-_Male.jpg
Image Author: Munish Jauhar | Image License: CC BY-SA 3.0
Current topic in Birds of India: Shikra - Accipiter badius.
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Crested goshawk

   ›      ›   Crested goshawk - Accipiter trivirgatus.

The crested goshawk (Accipiter trivirgatus) belongs to the family Accipitridae. These crested goshawk species are distributed in Indian subcontinent, South China, Southeast Asia, Indonesia and Philippines.

Taxonomy of Crested goshawk

  • Scientific Name: Accipiter trivirgatus
  • Common Name: Crested goshawk
  • French: Autour huppé; German: Schopfhabicht; Spanish: Azor moñudo;
  • Other names: Falco trivirgatus Temminck, 1824;
  • Family: Accipitridae › Accipitriformes › Aves › Chordata › Animalia
  • Species author: (Temminck, 1824)
Accipiter trivirgatus was earlier included in the genus Falco. It is closely related to A. virgatus. The recognized eleven subspecies are: A. t. peninsulae Koelz, 1949, A. t. layardi (Whistler, 1936), A. t. indicus (Hodgson, 1836), A. t. formosae Mayr, 1949, A. t. trivirgatus (Temminck, 1824), A. t. niasensis Mayr, 1949, A. t. javanicus Mayr, 1949, A. t. microstictus Mayr, 1949, A. t. castroi Manuel & Gilliard, 1952, A. t. palawanus Mayr, 1949 and A. t. extimus Mayr, 1949.

Indian birds - Image of Crested goshawk - Accipiter trivirgatus
Indian birds - Image of Crested goshawk - Accipiter trivirgatus

Description

The crested goshawk is a small bird of prey, measuring 30 to 45 cm in length and weighing about 350 grams. The female goshawk is larger than the male and weighs around 550 grams. The wingspan is 50 to 80 cm. The male has a dark brown crown. The head and sides are grey. It has black moustachial and throat stripes. The underparts are pale and the belly bears rufous bars. The breast is patterned with rufous streaks. The female goshawk has brown plumage. Its call is a screaming sound.

Habitat

The crested goshawk inhabits deciduous and evergreen forests in humid lowlands and foothills. Its range is limited to tropical and warm subtropical areas.

Feeding habits

The crested goshawk preys on large insects, birds, mammals and reptiles. It surprises its prey by diving from its perch.

Breeding

The crested goshawk breeding season depends upon its range. It generally breeds between December and May. The nest is built with sticks on the trees. The nest may have two to three eggs.

Distribution

The crested goshawk subspecies A. t. peninsulae is distributed in southwest India. The subspecies A. t. layardi is distributed in Sri Lanka. The goshawk subspecies A. t. indicus is distributed in North India, Nepal, South China, Indochina, Myanmar and Malaysia. The subspecies A. t. formosae is found in Taiwan. The goshawk subspecies A. t. trivirgatus is distributed in Indonesia. The subspecies A. t. niasensis is distributed in Indonesia. The subspecies A. t. javanicus is found in Java and Bali. The goshawk subspecies A. t. microstictus is found in Borneo Islands. The subspecies A. t. castroi is distributed in Philippines. The subspecies A. t. palawanus is distributed in Philippines and Indonesia. The goshawk subspecies A. t. extimus is found in Philippines.

Movement Patterns

The crested goshawk is considered sedentary and the juveniles disperse widely.

Status and conservation

The crested goshawk has an extremely large range and considered least vulnerable. It is common in its range and the global population is not quantified and considered to be in the tens of thousands. The loss of forest cover and increased human activities in its habitats are the main threats to the survival of these goshawk species.

The IUCN (International Union for Conservation of Nature) has categorized and evaluated these goshawk species and has listed them as "Least Concern".

Biological classification of Accipiter trivirgatus
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Accipitriformes
Family:Accipitridae
Subfamily:-
Genus:Accipiter
Species:A. trivirgatus
Binomial name:Accipiter trivirgatus
Distribution:Indian subcontinent, South China, Southeast Asia, Indonesia and Philippines;
Feeding habits:lizards, small mammals, frogs, large insects and birds;
IUCN status listing:
Least Concern

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Image source: https://commons.wikimedia.org/wiki/File:Accipiter_trivirgatus_PA273291.jpg
Image Author: Alnus | Image License: CC BY-SA 3.0
Current topic in Birds of India: Crested goshawk - Accipiter trivirgatus.
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