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Saturday, 30 July 2016

Haast's Eagle - South Island New Zealand - Now Extinct

Image result for haast eagle images
From Wikipedia, the free encyclopedia
Haast's eagle
Temporal range: Late Pleistocene–Holocene
Harpagornis moorei skull.jpg
Photo and restoration of skull

Extinct  (c.1400) (IUCN 3.1)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Accipitriformes
Family: Accipitridae
Genus: Harpagornis
Species: H. moorei
Binomial name
Harpagornis moorei
Haast, 1872
The Haast's eagle (Harpagornis moorei) is an extinct species of eagle that once lived in the South Island of New Zealand, commonly accepted to be the Pouakai of Maori legend.[1] The species was the largest eagle known to have existed. Its massive size is explained as an evolutionary response to the size of its prey - the flightless moa, the largest of which could weigh 230 kg (510 lb).[2] Haast's eagle became extinct around 1400, after the moa were hunted to extinction by the first Māori.[3]



Haast's eagle was first described by Julius von Haast in 1871 from remains discovered by F. Fuller in a former marsh.[4] Haast named the eagle Harpagornis moorei after George Henry Moore, the owner of the Glenmark Estate, where the bones of the bird had been found.[5] The genus name is from the Greek "harpax", meaning "grappling hook", and "ornis", meaning "bird".[citation needed]


DNA analysis has shown that this raptor is related most closely to the much smaller little eagle as well as the booted eagle and not, as previously thought, to the large wedge-tailed eagle.[6] Thus, Harpagornis moorei may eventually be reclassified as Hieraaetus moorei. H. moorei is estimated to have diverged from these smaller eagles as recently as 1.8 million to 700,000 years ago. If this estimate is correct, its increase in weight by ten to fifteen times is an exceptionally rapid weight increase. This was made possible in part by the presence of large prey and the absence of competition from other large predators.[7]


Artist's rendition of a Haast's eagle attacking moa
Haast's eagles were one of the largest known true raptors. In length and weight, Haast's eagle was even larger than the largest living vultures. Another giant eagle from the fossil record rivaled the Haast's in at least the aspect of total length, Amplibuteo woodwardi, although other estimations are not known of this more recently and scantly-described species.[8] Female eagles were significantly larger than males. Most estimates place the female Haast eagles in the range of 10–15 kg (22–33 lb) and males around 9–12 kg (20–26 lb).[9] A comparison to living eagles of the Australasian region resulted in estimated masses in Haast's eagles of 11.5 kg (25 lb) for males and 14 kg (31 lb) for females.[9] One source estimates that the largest females could have scaled more than 16.5 kg (36 lb) in mass.[10] However, even the largest extant eagles, none of which are verified to exceed 9 kg (20 lb) in a wild state, are about forty percent smaller in body size than Haast's eagles.[11]

Comparative morphology of Haast's eagle with its closest living relative, the little eagle
They had a relatively short wingspan for their size. It is estimated that the grown female typically spanned up to 2.6 m (8.5 ft), possibly up to 3 m (9.8 ft) in a few cases.[12][13] This wingspan is broadly similar to the larger range of female size in some extant eagles: the wedge-tailed eagles (Aquila audax), golden eagles (A. chrysaetos), steppe eagles (A. nipalensis), martial eagles (Polemaetus bellicosus) and Steller's sea eagles (Haliaeetus pelagicus).[11][14] Several of the largest extant Old World vultures, if not in mean mass or other linear measurements, probably exceeded Haast's eagle in average wingspan.[11][15]
Short wings may have aided Haast's eagles when hunting in the dense scrubland and forests of New Zealand. Haast's eagle has sometimes been portrayed incorrectly as having evolved toward flightlessness, but this is not so; rather it represents a departure from the mode of its ancestors' soaring flight, toward higher wing loading and the species probably had very broad wings.[16]
While most bones studied have been internal ones, some remains of Haast's eagles allow people to make comparisons to living eagles. The harpy eagle (Harpia harpyja) and the Philippine eagle (Pithecophaga jefferyi), which are the largest and most powerful living eagles alongside the Steller's sea eagle, also have similarly reduced relative wing-length in adaptation to forest-dwelling.[11] A lower mandible from the Haast's eagle measured 11.4 cm (4.5 in) and the tarsus in several Haast's fossils has been measured from 22.7 to 24.9 cm (8.9 to 9.8 in).[17] In comparison, the largest beaks of eagles today (from the Philippine and the Steller's sea eagle) reach a little more than 7 cm (2.8 in); and the longest tarsal measurements (from the Philippine and the Papuan eagle) top out around 14 cm (5.5 in).[15][18][19] The talons of the Haast's eagle were similar in length those of the harpy eagle, with a front-left talon length of 4.9 to 6.15 cm (1.93 to 2.42 in) and a hallux-claw of possibly up to 11 cm (4.3 in).[10] The Philippine eagle might make for particularly apt living species to compare the Haast's eagle with, because it too evolved in an insular environment from smaller ancestors (apparently basal snake eagles) to island gigantism in the absence of large carnivorous mammals and other competing predators.[20] The strong legs and massive flight muscles of these eagles would have enabled the birds to take off with a jumping start from the ground, despite their great weight. The tail was almost certainly long, in excess of 50 cm (20 in) in female specimens, and very broad. This characteristic would compensate for the reduction in wing area by providing additional lift.[9] Total length is estimated to have been up to 1.4 m (4 ft 7 in) in females, with a standing height of approximately 90 cm (2 ft 11 in) tall or perhaps slightly greater.[10]


A model on display at Te Papa of a Haast's eagle attacking a moa with its large talons
Haast's eagles preyed on large, flightless bird species, including the moa, which was up to fifteen times the weight of the eagle.[9] It is estimated to have attacked at speeds up to 80 km/h (50 mph),[21] often seizing its prey's pelvis with the talons of one foot and killing with a blow to the head or neck with the other.[citation needed] Its size and weight indicate a bodily striking force equivalent to a cinder block falling from the top of an eight-story building.[22] Its large beak also could be used to rip into the internal organs of its prey and death then would have been caused by blood loss.[citation needed] In the absence of other large predators or scavengers, a Haast's eagle easily could have monopolised a single large kill over a number of days.[1]


Until recent human colonisation that introduced rodents and cats, the only mammals found on the islands of New Zealand were three species of bat. Free from terrestrial mammalian competition and predatory threat, birds occupied or dominated all major niches in the New Zealand animal ecology because there were no threats to their eggs and chicks by small terrestrial animals. Moa were grazers, functionally similar to deer or cattle in other habitats, and Haast's eagles were the hunters who filled the same niche as top-niche mammalian predators, such as tigers or lions.
Early human settlers in New Zealand (the Māori arrived around the year 1280) preyed heavily on large flightless birds, including all moa species, eventually hunting them to extinction by around 1400.[3] The loss of its primary prey caused the Haast's eagle to become extinct at about the same time.[23]
A noted explorer, Charles Edward Douglas, claims in his journals that he had an encounter with two raptors of immense size in Landsborough River valley (probably during the 1870s), and that he shot and ate them;[24] but they may have been Eyles' harriers.

Relationship with humans

Statue on Macraes Flat
It is believed that these birds are described in many legends of the Māori, under the names Pouakai, Hokioi, or Hakawai.[21] However, it has been ascertained that the "Hakawai" and "Hokioi" legends refer to the Coenocorypha snipe—in particular the extinct South Island subspecies.[25] According to an account given to Sir George Grey, an early governor of New Zealand, Hokioi were huge black-and-white predators with a red crest and yellow-green tinged wingtips. In some Māori legends, Pouakai kill humans, which scientists believe could have been possible if the name relates to the eagle, given the massive size and strength of the bird.[21] Even smaller golden eagles are capable of killing prey as big as sika deer or a bear cub.[26]
Artwork depicting Haast's eagle now may be viewed at OceanaGold's Heritage and Art Park at Macraes, Otago, New Zealand. The sculpture, weighing approximately 750 kg (1,650 lb; 118 st), standing 7.5 metres (25 ft) tall, and depicted with a wingspan of 11.5 metres (38 ft) is constructed from stainless steel tube and sheet and was designed and constructed by Mark Hill, a sculptor from Arrowtown, New Zealand.[27]

See also


  • Giant eagle (Aquila moorei), Haast's eagle, or Pouakai. Museum of New Zealand: Te Papa Tongarewa. Retrieved 27 October 2010.

    1. "Giant art sculptures pop up in Otago". New Zealand: 3 News. 20 December 2008. Lifestyle - Video On Demand text version

    External links

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  • Davies, S. J. J. F. (2003)
  • Perry, George L.W.; Wheeler, Andrew B.; Wood, Jamie R.; Wilmshurst, Janet M. (2014-12-01). "A high-precision chronology for the rapid extinction of New Zealand moa (Aves, Dinornithiformes)". Quaternary Science Reviews. doi:10.1016/j.quascirev.2014.09.025. Retrieved 2014-12-22.
  • Tudge, Colin (6 August 2009). The Secret Life of Birds: Who they are and what they do. Penguin Books Limited. p. 117. ISBN 978-0-14-196210-8.
  • Haast, Julius (1872). "Notes on Harpagornis Moorei, an Extinct Gigantic Bird of Prey, containing Discussion of Femur, Ungual Phalanges and Rib". Transactions and Proceedings of the New Zealand Institute. 4. New Zealand Institute. pp. 193–196. Retrieved 29 September 2014.
  • Bunce, M.; Szulkin, Marta; Lerner, Heather R. L.; Barnes, Ian; Shapiro, Beth; Cooper, Alan; Holdaway, Richard N. (2005). "Ancient DNA Provides New Insights into the Evolutionary History of New Zealand's Extinct Giant Eagle". PLoS Biology. 3 (1): e9. doi:10.1371/journal.pbio.0030009. PMC 539324free to read. PMID 15660162.
  • "Ancient DNA Tells Story of Giant Eagle Evolution". PLoS Biology. 3 (1). 4 January 2005. doi:10.1371/journal.pbio.0030020. Retrieved 1 December 2015.
  • Suarez, W. (2004). The identity of the fossil raptor of the genus Amplibuteo (Aves: Accipitridae) from the Quaternary of Cuba. Caribbean Journal of Science, 40(1), 120-125.
  • Brathwaite, D. H. (December 1992). "Notes on the weight, flying ability, habitat, and prey of Haast's Eagle (Harpagornis moorei)" (PDF). Notornis. Ornithological Society of New Zealand. 39 (4): 239–247. Retrieved 26 January 2014.
  • Worthy, T. & Holdaway, R., The Lost World of the Moa: Prehistoric Life of New Zealand. Indiana University Press (2003), ISBN 978-0253340344
  • Wood, Gerald (1983). The Guinness Book of Animal Facts and Feats. ISBN 978-0-85112-235-9.
  • Maas, P. "Recently Extinct Animals - Species Info - Haast's Eagle". The Sixth Extinction. Retrieved 19 April 2013.
  • "Haast's Eagle". Paleobiology and Biodiversity Research Group. Retrieved 19 April 2013.
  • Eagles, Hawks and Falcons of the World by Leslie Brown & Dean Amadon. The Wellfleet Press (1986), ISBN 978-1555214722.
  • Ferguson-Lees, J.; Christie, D. (2001). Raptors of the World. London: Christopher Helm. ISBN 0-7136-8026-1.
  • "Haast's eagle, New Zealand giant eagle". BBC. Archived from the original on 28 February 2009. Retrieved 30 September 2014.
  • Hamilton, A. 1888. On Avian Remains in Southland. Transactions, The New Zealand Institute.
  • Ladyguin, Alexander (2000). The morphology of the bill apparatus in the Steller's Sea Eagle. First Symposium on Steller's and White-tailed Sea Eagles in East Asia pp. 1–10; Ueta, M. & McGrady, M.J. (eds.) Wild Bird Society of Japan
  • Blas R. Tabaranza Jr. "Haribon – Ha ring mga Ibon, King of Birds". Haring Ibon's Flight…. Retrieved 2013. Check date values in: |access-date= (help)
  • Lerner, H. R., & Mindell, D. P. (2005). Phylogeny of eagles, Old World vultures, and other Accipitridae based on nuclear and mitochondrial DNA. Molecular phylogenetics and evolution, 37(2), 327-346.
  • Rodgers, Paul (14 September 2009). "Maori legend of man-eating bird is true". The Independent. Retrieved 14 September 2009.
  • Kennedy Warne. Hotspot: New Zealand, National Geographic Magazine, October 2002. Retrieved 27 October 2010.
  • Tennyson, A.; Martinson, P. (2006). Extinct Birds of New Zealand. Wellington, New Zealand: Te Papa Press. ISBN 978-0-909010-21-8.
  • Worthy, T. H.; Holdaway, R. N. (2002). The lost world of the Moa: Prehistoric Life of New Zealand. Bloomington: Indiana University Press. ISBN 0-253-34034-9.
  • Miskelly, C. M. (1987). "The identity of the hakawai" (PDF). Notornis. 34 (2): 95–116.
  • "Golden eagle attacks deer in rare camera trap footage". ZSL Conservation. 26 September 2013. Retrieved 2 August 2014.
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