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Post by sebbe67 on May 11, 2005 11:01:30 GMT
New Zealand Crow Palaeocorax moriorum
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Post by Melanie on May 11, 2005 11:08:33 GMT
It would be great if you can give any information you find in your books or at the Internet. Only a name is to less.
That's what i have found:
In 1892 H.O. Forbes discovered sub-fossilized bones which have since been found also at old Maori coastal sites around New Zealand as well as Stewart Island and the Chatham Islands.
Weight ca. 1 kg.
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Post by Deleted on May 11, 2005 11:57:46 GMT
Hi !
Palaeocorax is a very old and invalid name. Here are the valid names of the three known crows from the New Zealand area.
Corvus antipodium antipodium-North Island
Corvus antipodium pycrofti-South Island
Corvus moriorum-Chatham Islands
Bye Alex
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Post by sebbe67 on Oct 30, 2005 18:39:20 GMT
where did you find the photo on the skulls Noisi?
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Post by Deleted on Oct 30, 2005 18:43:55 GMT
The skulls were from 'the lost world of the moa', I should scan them in again if I had some time for that.  |
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Post by another specialist on Oct 30, 2005 18:56:11 GMT
The skulls were from 'the lost world of the moa', I should scan them in again if I had some time for that. That would be great if you can Noisi |
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Post by another specialist on Oct 30, 2005 19:00:55 GMT
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Post by another specialist on Oct 30, 2005 19:02:51 GMT
Gill, B. J. 2003. Osteometry and systematics of the extinct New Zealand ravens (Aves: Corvidae: Corvus). Journal of Systematic Palaeontology 1: 43-58. Measurements of Holocene raven bones show that birds from the Chatham Islands were significantly larger than those from the South Island, which were in turn larger than North Island birds. Three taxa are recognised: the Chatham Islands raven Corvus moriorum, the North Island raven C. antipodum antipodum, and the South Island raven C. a. pycrafti. New Zealand ravens were the largest crows in the Australasian region, and the Chatham Islands raven was probably the world's fourth- or fifth-largest passerine. New Zealand ravens were strong fliers with no reduction in flying ability compared to weak-flying New Zealand birds like the kokako. www.nzes.org.nz/hotscience/g.html |
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Post by Carlos on Feb 23, 2006 19:57:59 GMT
HOLDAWAY, R.N. (1989): New Zealand's pre-human avifauna and its vulneability. New Zealand Journal of Ecology, Vol 12, (Supplement), 11-25.
Corvus moriorum (New Zealand raven) (Group II)
North, South, and Chatham Is; forest and scrub, usually near coast. Weight 900-1000 g. Omnivore, food including fruit, large insects, carrion (bird and marine mammal), lizards, tuatara, nesting petrels. Large stick nest in trees or on cliffs. Scavenger at Harpagornis kills. Possible predator on moa chicks. Vulnerable to human predation, habitat loss, reduction of food supply, particularly carrion.
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Post by Peter on Mar 2, 2006 9:52:42 GMT
Source: Worthy, T.H., Holdaway R.N., 2002, The lost world of the Moa: Prehistoric Life of New Zealand, Indiana University Press, Bloomington. ISBN: 0253340349.
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Family Corvidae.
Genus Corvus Linnaeus
Corvus moriorum Forbes, 1892 (Chatham Island Raven)
Corvus sp. (New Zealand Raven)
The New Zealand ravens are another group whose taxonomy still suffers from H.O. Forbes's inability to finish a scientific project or paper. The name for the Chatham Island bird is well enough established, although his later removal of the species to a new genus - Palaeocorax - was unwarranted on present evidence. The mainland birds were significant smaller than those from the Chathams, and the South Island birds were rather larger than those in the North Island. The species name antipodum was proposed by Forbes for the North Island form, but, as with the harriers, it is not certain which bones he was examining at the time (Forbes 1893e). The distinction of the Chatham raven at the species level fits with the general pattern that birds there had been isolated from the parent species on the main islands for substantial periods of time. That in itself suggests that suitable habitat for terrestrial birds has existed in the Chatham Islands though glacial-interglacial cycles.
New Zealand ravens were large crows with long, broad bills that were not as arched as those of some of the Hawaiian crows (Olson and James 1992). All forms are now extinct. Their remains are most common in coastal sites, both on the main islands and on the Chatham Islands. The South Island form was typical part of the eastern fauna during the Holocene. It is found in deposits of Pleistocene age on the West Coast and in deposits of both Pleistocene and Holocene age in the east and south. A single bone is known from the subantarctic Aukland Islands, so it is not clear whether it represents a resident population or a vagrant from the mainland. Only a single individual was found in Pyramid Valley, and the species is uncommon at Poukawa in the North Island, where tens of thousands of bones were preserved. On the coast, it may have frequented the seal and penguin colonies or fed in the intertidal zone, as does the Tasmanian forest raven Corvus tasmanicus. Alternativlely, it may have depended on fruit, like the New Caledonian crow Corvus moneduloides, but it is difficult to understand why a fruit eater would have been most common in coastal forest and shrubland when fruit was distributed thoughhout the forest. (Pages: 437-439)
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The authors of the book/publication compiled also a Systematic List of Late Holocene Avifauna, and there the name the following crow species:
Family Corvidae
Corvus "mainland" - New Zealand raven
Corvus moriorum Forbes, 1892 - Chatham Island raven
(Page: 575)
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Post by Peter on Mar 2, 2006 20:33:50 GMT
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Post by cryptodude100 on May 24, 2006 20:16:05 GMT
Does anyone how long the new zealand ravens were or an estimated wingspan? I expect less than a northern raven which can have a 50 inch wingspan. How long is the skull? Thank You!
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Post by dysmorodrepanis on May 27, 2006 15:25:19 GMT
Does anyone how long the new zealand ravens were or an estimated wingspan? I expect less than a northern raven which can have a 50 inch wingspan. How long is the skull? Thank You! Gill's paper given by another specialist above should answer these questions, if you can get it. |
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Post by cryptodude100 on May 31, 2006 19:13:51 GMT
I have that article and it doesn't say anything about wingspan but only measurements of bones.  |
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Post by another specialist on Dec 31, 2006 11:10:16 GMT
 New Zealand Extinct Birds Brian Gill and Paul Martinson |
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Post by another specialist on Dec 31, 2006 12:01:56 GMT
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Post by cryptodude100 on Jan 13, 2007 19:26:06 GMT
what is known about the measurements of corvus moriorum?
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Post by Carlos on Aug 12, 2007 17:20:26 GMT
Gill, B. J. 2003. Osteometry and systematics of the extinct New Zealand ravens (Aves: Corvidae: Corvus). Journal of Systematic Palaeontology 1: 43-58. Measurements of Holocene raven bones show that birds from the Chatham Islands were significantly larger than those from the South Island, which were in turn larger than North Island birds. Three taxa are recognised: the Chatham Islands raven Corvus moriorum, the North Island raven C. antipodum antipodum, and the South Island raven C. a. pycrafti. New Zealand ravens were the largest crows in the Australasian region, and the Chatham Islands raven was probably the world's fourth- or fifth-largest passerine. New Zealand ravens were strong fliers with no reduction in flying ability compared to weak-flying New Zealand birds like the kokako. www.nzes.org.nz/hotscience/g.htmlA more complete abstract of the same article: OSTEOMETRY AND SYSTEMATICS OF THE EXTINCT NEW ZEALAND RAVENS (AVES: CORVIDAE: CORVUS) -------------------------------------------------------------------------------- B. J. Gill Auckland Museum, Private Bag 92018, Auckland, New Zealand Journal of Systematic Palaeontology (2003), 1: 43-58 Cambridge University Press Abstract Measurements of Holocene raven bones from New Zealand show that birds from the Chatham Islands were significantly larger, on average, than those from the South Island, which were in turn significantly larger than North Island birds. Size variation on the North and South Islands appears to have been clinal in accordance with Bergmann's Rule. Three taxa are recognised: the Chatham Islands raven Corvus moriorum Forbes, 1892, the North Island raven C. antipodum antipodum (Forbes, 1893) and the South Island raven C. a. pycrafti n. subsp. A lectotype is designated for C. moriorum and a neotype for C. antipodum. New Zealand ravens were the largest crows in the Australasian region, and the Chatham Islands raven was probably the world's fourth- or fifth-largest passerine. Nothing in the shape or relative size of New Zealand raven bones suggests adaptation for anything other than the generalised crow niche, except that the tarsometatarsus is relatively long, perhaps as an adaptation to increased walking or running on the ground. New Zealand ravens were strong fliers with no reduction in flying ability compared to weak-flying New Zealand birds such as Callaeas. New Zealand ravens had a more ossified palate than C. brachyrhychos and C. corax of the Northern Hemisphere, while C. coronoides of south-east Australia seems to be intermediate in this regard. C. coronoides is the most probable closest relative of New Zealand ravens, and the latter probably developed from an invasion of New Zealand by C. coronoides or crows ancestral to it. Key Words: Corvus; New Zealand; Chatham Islands; Osteometry; Holocene; Pleistocene. |
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Post by another specialist on Jul 15, 2008 18:58:31 GMT
 Extinct birds : an attempt to unite in one volume a short account of those birds which have become extinct in historical times : that is, within the last six or seven hundred years : to which are added a few which still exist, but are on the verge of extinction (1907) |
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Post by Peter on Dec 29, 2013 18:18:43 GMT
Does anyone how long the new zealand ravens were or an estimated wingspan? I expect less than a northern raven which can have a 50 inch wingspan. How long is the skull? Thank You! The bird reached a size of 72cm in total length, making it one of the largest passerines known (Hume & Walters, 2012). |
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