Species of bird
Grey crow |
Conservation status |
Least Concern (IUCN 3.1)[1] |
Scientific classification |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Passeriformes |
Family: | Corvidae |
Genus: | Corvus |
Species: | C. tristis |
Binomial name |
Corvus tristis
Lesson & Garnot, 1827 |
|
Distribution map |
The gray crow (Corvus tristis), formerly known as the bare-faced crow, is about the same size (42–45 cm in length) as the Eurasian carrion crow (Corvus corone) but has somewhat different proportions and quite atypical feather pigmentation during the juvenile phase for a member of this genus.
The tail feathers are relatively long and graduated and the legs are relatively short. The overall colouring of the adult bird is black with randomly bleached wing and tail feathers. A large region around the eye is quite bare of feathering and shows pinkish-white skin with the eyes a bluish-white. The bill is unusual too in being very variable, bluish on upper mandible and pinkish-white on the lower in some specimens, while on others the whole bill is pinkish white with a darker tip. The forward pointing nasal bristles so often prominent in other Corvus species are very reduced also.
The juvenile bird by comparison has remarkably pale plumage being light brown to cream, the wings, tail and primaries showing blackish-brown and fawn and the head and underparts often almost white.
The species occurs all over the huge island of New Guinea and associated offshore islands in both primary and secondary forest in both lowland and hill forest up to 1350 m.
Feeding is both on the ground and in trees taking a very wide range of items. Fruit seems to be very important making up a large percentage of the intake though small animals such as frogs and aquatic insect larvae are taken from shallow water on sand or shingle beds in rivers. When foraging through the trees the birds keep loose, noisy contact with each other and usually number between 4–8 individuals.
The voice is described as a weak sounding 'ka' or a whining 'caw' with other hoarse sounding notes added when excited.
References
- ^ BirdLife International (2016). "Corvus tristis". IUCN Red List of Threatened Species. 2016: e.T22705975A94044319. doi:10.2305/IUCN.UK.2016-3.RLTS.T22705975A94044319.en. Retrieved 12 November 2021.
|
|
---|
Choughs | Pyrrhocorax | - Alpine chough (P. graculus)
- Red-billed chough (P. pyrrhocorax)
|
---|
|
---|
Treepies | Crypsirina | - Hooded treepie (C. cucullata)
- Black racket-tailed treepie (C. temia)
|
---|
Dendrocitta | - Andaman treepie (D. bayleyi)
- Bornean treepie (D. cinerascens)
- Grey treepie (D. formosae)
- Black-faced treepie (D. frontalis)
- White-bellied treepie (D. leucogastra)
- Sumatran treepie (D. occipitalis)
- Rufous treepie (D. vagabunda)
|
---|
Platysmurus | - Malayan black magpie (P. leucopterus)
- Bornean black magpie (P. aterrimus)
|
---|
Temnurus | - Ratchet-tailed treepie (T. temnurus)
|
---|
|
---|
Oriental magpies | Cissa | - Common green magpie (C. chinensis)
- Indochinese green magpie (C. hypoleuca)
- Bornean green magpie (C. jefferyi)
- Javan green magpie (C. thalassina)
|
---|
Urocissa | - Taiwan blue magpie (U. caerulea)
- Red-billed blue magpie (U. erythrorhyncha)
- Yellow-billed blue magpie (U. flavirostris)
- Sri Lanka blue magpie (U. ornata)
- White-winged magpie (U. whiteheadi)
|
---|
|
---|
Old World jays | Garrulus | - Eurasian jay (G. glandarius)
- Lanceolated jay (G. lanceolatus)
- Lidth's jay (G. lidthi)
|
---|
Podoces (Ground jays) | - Xinjiang ground jay (P. biddulphi)
- Mongolian ground jay (P. hendersoni)
- Turkestan ground jay (P. panderi)
- Iranian ground jay (P. pleskei)
|
---|
Ptilostomus | |
---|
|
---|
Stresemann's bushcrow | Zavattariornis | - Stresemann's bushcrow (Z. stresemanni)
|
---|
|
---|
|
|
|
---|
Nutcrackers | Nucifraga | - Spotted nutcracker (N. caryocatactes)
- Clark's nutcracker (N. columbiana)
- Kashmir nutcracker (N. multipunctata)
|
---|
|
---|
Holarctic magpies | Pica | - Black-billed magpie (P. hudsonia)
- Yellow-billed magpie (P. nuttalli)
- Eurasian magpie (P. pica)
- Oriental magpie (P. sericea)
- Maghreb magpie (P. mauritanica)
- Asir magpie (P. asirensis)
- Black-rumped magpie (P. bottanensis)
|
---|
|
---|
True crows | Corvus | - Australian and Melanesian species
- Little crow (C. bennetti)
- Australian raven (C. coronoides)
- Bismarck crow (C. insularis)
- Brown-headed crow (C. fuscicapillus)
- Bougainville crow (C. meeki)
- Little raven (C. mellori)
- New Caledonian crow (C. moneduloides)
- Torresian crow (C. orru)
- Forest raven (C. tasmanicus)
- Grey crow (C. tristis)
- Long-billed crow (C. validus)
- White-billed crow (C. woodfordi)
- Pacific island species
- Hawaiian crow (C. hawaiiensis)
- Mariana crow (C. kubaryi)
- Tropical Asian species
- Slender-billed crow (C. enca)
- Small crow (C. samarensis)
- Palawan crow (C. pusillus)
- Flores crow (C. florensis)
- Large-billed crow (C. macrorhynchos)
- Eastern jungle crow (C. levaillantii)
- Indian jungle crow (C. culminatus)
- House crow (C. splendens)
- Collared crow (C. torquatus)
- Piping crow (C. typicus)
- Banggai crow (C. unicolor)
- Violet crow (C. violaceus)
- Eurasian and North African species
- Mesopotamian crow (C. capellanus)
- Hooded crow (C. cornix)
- Carrion crow (C. corone)
- Rook (C. frugilegus)
- Eastern carrion crow (C. orientalis)
- Fan-tailed raven (C. rhipidurus)
- Brown-necked raven (C. ruficollis)
- Holarctic species
- Common raven (C. corax)
- North and Central American species
- American crow (C. brachyrhynchos)
- Chihuahuan raven (C. cryptoleucus)
- Tamaulipas crow (C. imparatus)
- Jamaican crow (C. jamaicensis)
- White-necked crow (C. leucognaphalus)
- Cuban palm crow (C. minutus)
- Cuban crow (C. nasicus)
- Fish crow (C. ossifragus)
- Hispaniolan palm crow (C. palmarum)
- Sinaloan crow (C. sinaloae)
- Tropical African species
- White-necked raven (C. albicollis)
- Pied crow (C. albus)
- Cape crow (C. capensis)
- Thick-billed raven (C. crassirostris)
- Somali crow (C. edithae)
|
---|
|
---|
Jackdaws | |
---|
|
|
|
---|
Azure-winged magpies | Cyanopica | - Iberian magpie (C. cooki)
- Azure-winged magpie (C. cyanus)
|
---|
|
---|
Grey jays | Perisoreus | - Canada jay (P. canadensis)
- Siberian jay (P. infaustus)
- Sichuan jay (P. internigrans)
|
---|
|
---|
New World jays | Aphelocoma (Scrub jays) | - California scrub jay (A. californica)
- Island scrub jay (A. insularis)
- Woodhouse's scrub jay (A. woodhouseii)
- Florida scrub jay (A. coerulescens)
- Transvolcanic jay (A. ultramarina)
- Unicolored jay (A. unicolor)
- Mexican jay (A. wollweberi)
|
---|
Calocitta (Magpie-Jays) | - Black-throated magpie-jay (C. colliei)
- White-throated Magpie-jay (C. formosa)
|
---|
Cyanocitta | - Blue jay (C. cristata)
- Steller's jay (C. stelleri)
|
---|
Cyanocorax | - Black-chested jay (C. affinis)
- Purplish-backed jay (C. beecheii)
- Azure jay (C. caeruleus)
- Cayenne jay (C. cayanus)
- Plush-crested jay (C. chrysops)
- Curl-crested jay (C. cristatellus)
- Purplish jay (C. cyanomelas)
- White-naped jay (C. cyanopogon)
- Tufted jay (C. dickeyi)
- Azure-naped jay (C. heilprini)
- Bushy-crested jay (C. melanocyaneus)
- Brown jay (C. morio)
- White-tailed jay (C. mystacalis)
- San Blas jay (C. sanblasianus)
- Violaceous jay (C. violaceus)
- Green jay (C. ynca)
- Yucatan jay (C. yucatanicus)
|
---|
Cyanolyca | - Silvery-throated jay (C. argentigula)
- Black-collared jay (C. armillata)
- Azure-hooded jay (C. cucullata)
- White-throated jay (C. mirabilis)
- Dwarf jay (C. nana)
- Beautiful jay (C. pulchra)
- Black-throated jay (C. pumilo)
- Turquoise jay (C. turcosa)
- White-collared jay (C. viridicyana)
|
---|
Gymnorhinus | - Pinyon jay (G. cyanocephalus)
|
---|
|
---|
|
|
Taxon identifiers |
---|
Corvus tristis | |
---|