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Violet Crow Corvus violaceus Scientific name definitions

Josep del Hoyo, Nigel Collar, and David Christie
Version: 1.0 — Published March 4, 2020
Text last updated April 11, 2018

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Field Identification

40–43 cm. Rather slender crow, medium-sized and has mid-length slightly graduated tail, forecrown slightly peaked, culmen decurved, inconspicuous throat hackles; in flight relatively broad, blunt wings and relatively short square-tipped tail. Adult has matt black hood extending to lower throat and nape; rest of plumage blue-black with mauve sheen, latter most obvious on wings; iris dark brown, tiny area of bare black skin behind eye and narrowly encircling latter; bill fairly long and deep, culmen gently decurving throughout its length, black; legs black. Sexes alike. Juvenile lacks mauve sheen of adult.

Systematics History

Until recently considered conspecific with C. enca, but molecular evidence (1) suggests that it is unrelated; differs from taxa in that species (which see) in its barely visible but (on specimens) well-defined black hood contrasting with deep blue-black body (2); slightly shorter bill than other taxa (1) except C. e. sierramadrensis, which has a much smaller wing and tail (at least 2); and two highly distinct vocalizations, a short high “rah” (at least 2) and a nasal mewing “nyeh” (at least 2) (2). Monotypic.

Subspecies

Monotypic.

Distribution

Seram and Ambon, possibly also Buru, in S Moluccas.

Habitat

Forest and forest edge, also plantations; will move to semi-open areas, such as farmland, to forage. Sea-level to 1000 m, but below 1800 m; one recorded at 1400 m on Gunung Binaiya (C Seram) in 2012 (3).

Movement

Resident.

Diet and Foraging

Little known. Presumably omnivorous, feeding on fruits as well as on various invertebrates; general diet probably very similar to that of C. enca. On Seram, reported as flocking to feed on fields of ripening maize (Zea mays). Forages on ground but more commonly in trees, mainly in midstorey and canopy. Forages singly, in pairs and sometimes in small groups.

Sounds and Vocal Behavior

Calls  include a simple slightly metallic nasal bark, singly or repeated once or twice, and a somewhat trumpeting “erk”. Distinctive vocalizations include a short high-pitched “rah” and a nasal mewing “nyeh”.

Breeding

Very little information. Eggs found in Jun on Seram, described as white with sparse yellowish-brown speckling. Other details probably much as for C. enca.

Not globally threatened (Least Concern). Uncommon or fairly uncommon throughout range. No estimates of this species’ global population have been made, but it is believed not to be currently at any significant risk. Habitat destruction could pose a serious threat, but as yet this appears not to be too serious a problem. Field studies aimed at assessing the size of the population, followed by subsequent regular monitoring, would seem to be desirable.

Distribution of the Slender-billed Crow (Violet) - Range Map
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  • Year-round
  • Migration
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Distribution of the Slender-billed Crow (Violet)

Recommended Citation

del Hoyo, J., N. Collar, and D. A. Christie (2020). Violet Crow (Corvus violaceus), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.slbcro3.01
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