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Post by sebbe67 on May 11, 2005 10:57:35 GMT
Eyles' Harrier Circus eylesi
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Post by another specialist on Jun 5, 2005 5:52:39 GMT
bones found during the 1949 excavations at Pyramid valley in North Canterbury. The species was described in 1953 by Ron Scarlett of the Canterbury Museum, and named after his colleague J.R. Eyles.
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Post by dysmorodrepanis on Jun 24, 2005 15:20:11 GMT
An interesting form, shown without doubt to be a harrier by Richard Holdaway in the 90s. Wing proportions are like an Accipiter hawk, however, just as in the Hawaiian analogue Circus dossenus (also extinct before Western contact).
These two species did not hunt mammals, reptiles etc by soaring and gliding over terrain as harriers do, because their usual prey was not present in their home islands. Instead, they had taken to the canopy ambush hunting style used by harriers and sparrowhawks. They do not have the long, pointed wings of Circus, but short, rounded ones like Accipiter.
Both were probably close relatives of the Pacific Harrier Circus approximans. The NZ form may also have been derived or share a common ancestor with Circus assimilis (C. approximans occurs on NZ today). This is not likely, however, as approximans colonized NZ only after eylesi was extinct, so it is indeed probable that eylesi was an insular representative of approximans.
There may have been distinct N Island and S Island subspecies. If that is so, the South Island form would be Circus eylesi eylesi and the North Island form would need to be described - it was named as a separate species by Forbes, but his descriptions are invalid.
Circus dossenus might alternatively be derived from Circus cyaneus or its ancestor; this species occurs on Hawai'i today as an occasional vagrant.
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Post by another specialist on Jul 23, 2005 9:47:33 GMT
interesting entry dysmorodrepanis
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Post by dysmorodrepanis on Jul 23, 2005 14:28:41 GMT
interesting entry dysmorodrepanis Well, in case you'd put your artistic skills to use on these guys, I thought I'd give you a starting point  |
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Post by another specialist on Jul 24, 2005 6:36:57 GMT
thanks mate |
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Post by cryptodude100 on May 24, 2006 19:57:17 GMT
How big is Circus eylesi? Thank You!
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Post by cryptodude100 on Jun 3, 2006 19:11:26 GMT
In the North Island, they were as large as some subspecies of golden eagles. The New zealand Harrier was much larger than the Australasian harrier in most dimensions. A female C. aeruginosus may reach 1.1 kg. A large female C. approximans has a mass of about 0.75 kg, so the New Zealand harrier was 4 times heavier. Circus eylesi was considerably larger than the extant C. approximans and approach the size of Aquila. It may weigh 3-4 kg.
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Post by cryptodude100 on Jan 12, 2007 18:14:54 GMT
What would be an estimated wingspan be if it had the same length of wing bones as modern harriers?
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Post by Melanie on Jul 15, 2008 2:49:26 GMT
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Post by another specialist on Jul 17, 2008 17:03:57 GMT
Forbes' Harrier (Circus teauteensis) C. teauteensis is a nomen nudum of C. eylesi. The name was used to refer to some eylesi bones but the taxon was never properly described. C. hamiltoni is the same. The picture gives the size of the bird well: kererû are hefty pigeons, well larger than domestic ones. C. eylesi was the size of a small eagle. Thank's for very much and detailed informations.  Circus eylesi or Circus teauteensis is same species from this pages. And is true. Thank You for all information. Two late-Glacial avifaunas from eastern North Island, New Zealand - Te Aute Swamp and Wheturau Quarry Trevor H. Worthy Palaeofaunal Surveys, 43 The Ridgeway, Nelson, New Zealand Late-Glacial faunas from Wheturau Quarry near Gisborne and Te Aute, near Napier, North Island, New Zealand, are described and radiocarbon dates presented. These faunas suggest that the eastern North Island was covered in open shrubland until 10 500 yrs B.P. There were significant changes in the fauna of the eastern North Island during the early Holocene, when the dominant moa species was replaced; the key species Cnemiornis gracilis disappeared from the fauna; and others, such as Euryanas finschi, became scarce. The Wheturau fauna includes the largest collection of Cnemiornis gracilis bones yet found, and a storm petrel that may be Oceanites maorianus, named from three skins collected last century off Banks Peninsula. The Te Aute site is notable for the large number of moa bones preserved, especially Euryapteryx curtus and Dinornis giganteus. It is also the type locality for Dinornis gazella Oliver, Cnemiornis gracilis Forbes, Circus teauteensis Forbes, Circus hamiltoni Forbes, and Phalacrocorax novaezealandiae var. major Forbes. The record of Harpagornis moorei from Te Aute is shown to have been an error in identification by Hamilton, and Harpagornis is therefore unknown from the North Island. Keywords late-Glacial; avifauna; H. O. Forbes; Te Aute; Wheturau; North Island; New Zealand; radiocarbon dates; palaeoenvironment (c) Journal of The Royal Society of New Zealand, Volume 30, Number 1, March 2000, pp 1-25 www.rsnz.org/publish/jrsnz/2000/1.phpThe author in this paper describes twelve species new to the ancient bird-life of New Zealand. The list is headed by two harriers, i.e.,Circus hamiltoni and Circus teauteensis, two raptorial birds much larger than the present New Zealand harrier (Circus gouldi) without approaching in size or power the gigantic Harpagornis. rsnz.natlib.govt.nz/volume/rsnz_24/rsnz_24_00_001230.html |
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Post by another specialist on Jul 17, 2008 17:04:18 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 surroundx on Nov 14, 2016 9:39:21 GMT
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Post by surroundx on Nov 14, 2016 12:20:45 GMT
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Post by surroundx on Nov 16, 2017 11:09:59 GMT
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Post by surroundx on Jul 15, 2018 1:35:01 GMT
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Post by surroundx on Jul 15, 2018 1:45:33 GMT
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Post by Melanie on Feb 11, 2019 12:39:31 GMT
Michael Knapp, Jessica E. Thomas, James Haile, Stefan Prost, Simon Y.W. Ho, Nicolas Dussex, Sophia Cameron-Christie, Olga Kardailsky, Ross Barnett, Michael Bunce, M. Thomas P. Gilbert, R. Paul Scofield: Mitogenomic evidence of close relationships between New Zealand’s extinct giant raptors and small-sized Australian sister-taxa, Molecular Phylogenetics and Evolution, 2019, doi.org/10.1016/j.ympev.2019.01.026Abstract Prior to human arrival in the 13th century, two large birds of prey were the top predators in New Zealand. In the absence of non-volant mammals, the extinct Haast's eagle (Hieraaetus moorei), the largest eagle in the world, and the extinct Eyles' harrier (Circus teauteensis) the largest harrier in the world, had filled ecological niches that are on other landmasses occupied by animals such as large cats or canines. The evolutionary and biogeographic history of these island giants has long been a mystery. Here we reconstruct the origin and evolution of New Zealand’s giant raptors using complete mitochondrial genome data. We show that both Eyles’ harrier and Haast’s eagle diverged from much smaller, open land adapted Australasian relatives in the late Pliocene to early Pleistocene. These events coincided with the development of open habitat in the previously densely forested islands of New Zealand. Our study provides evidence of rapid evolution of island gigantism in New Zealand’s extinct birds of prey. Early Pleistocene climate and environmental changes were likely to have triggered the establishment of Australian raptors into New Zealand. Our results shed light on the evolution of two of the most impressive cases of island gigantism in the world. www.sciencedirect.com/science/article/pii/S1055790318306328?via%3Dihub |
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Post by Melanie on Feb 11, 2019 13:16:15 GMT
Brian J. Gill, Ricardo Palma, Alan J. D. Tenyson, R. Paul Scofield, B. D. Bell, G. K. Chambers, D. G. Medway, Trevor H. Worthy: Checklist of the Birds of New Zealand, Norfolk and Macquarie Islands, and the Ross Dependency, Antarctica, 4. Auflage, Checklist Committee Ornithological Society of New Zealand, Te Papa Press in association with the Ornithological Society of New Zealand Inc., 2010, ISBN 978-1-877385-59-9, p 171 †Circus teauteensis Forbes Eyles’ Harrier Circus teauteensis Forbes, 1892: Trans. Proc. N.Z. Inst. 24: 186 – Te Aute, Hawke’s Bay. Circus hamiltoni Forbes, 1892: Trans. Proc. N.Z. Inst. 24: 186 – Te Aute, Hawke’s Bay. Circus eylesi Scarlett, 1953: Rec. Cant. Museum 6: 247 – Pyramid Valley, Canterbury. Forbes (1892) established the names Circus hamiltoni and C. teauteensis simultaneously for two fossil harriers without adequate descriptions, and with no reference to specimens or localities. These names were therefore nomina dubia. Casts and the original syntypes of these taxa are preserved, labelled as such, in the Palaeontology Department, Natural History Museum, London (Lambrecht 1933, Dawson 1958, Worthy 2000), which removes the status of nomina dubia from these names, contra Worthy (2000). The museum catalogue makes it clear that the specimens were the basis of Forbes’ 1892 names (it cites the reference) and identifi es their collection locality. Furthermore, it is clear they are synonyms of Circus eylesi Scarlett (Worthy 2000). Following Dawson’s recommendation (1958), we accept both as senior synonyms of C. eylesi and adopt C. teauteensis (for which the right tibiotarsus BMNH A1534 is the only surviving syntype) as the senior name. Known from several Pleistocene–Holocene fossil sites and middens widely scattered in both North and South Islands. www.researchgate.net/publication/272507435_Checklist_of_the_Birds_of_New_Zealand_Norfolk_and_Macquarie_Islands_and_the_Ross_Dependency_Antarctica |
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