Saturday, April 13, 2013
AUSTRALIA'S GENYORNIS, EXTINCT ANIMALS AND TRACKS IN ROCK ART:
Extraordinary Engraved Bird Track from North
Australia, Ouzman, et. al., 2002, Cambridge
Arch. Journal, Vol. 12, 2002, p. 103-112.
In 2002, a fascinating article published in the Cambridge Archaeological Journal (Ouzman et. al., Vol. 12, p. 103-112) described and illustrated a petroglyph in Australia of a large three toed footprint that they interpreted as a representation of the track of Genyornis newtoni.
“Genyornis was a large flightless bird, considerably taller and heavier than the modern ostrich or emu. It had powerful legs and tiny wings, and probably most closely resembled its living relatives, ducks and geese. But instead of having webbed feet and a duckbill, Genyornis had large hoof-like claws on its toes and a big beak, with which it ate fruit and nuts, and perhaps small prey. Like modern birds, it had no teeth, but relied on gizzard stones to assist its digestion.
Genyornis lived in the dry grasslands and woodlands of southern and eastern Australia. Fossils have been found in Victoria, New South Wales and South Australia, especially on the surface of the dry Lake Callabonna. The bones of a number of birds have been found in one place, suggesting that they lived in flocks. Fossil eggs and footprints have also been found.
Genyornis illustration, artist: Peter Trussler.
Genyornis was the last of the dromornithids, and was small compared to other species. This family of giant birds is known by a variety of names, including ‘thunder birds’, ‘demon ducks’ and ‘mihirungs’. Humans almost certainly lived alongside these birds, and some scientists think that hunting may have contributed to their extinction. Other scientists think the extinction of Australian megafauna was linked to the continent becoming drier during the last Ice Age. (museumvictoria.com.au/Melbournemuseum)”
Pictographs identified as Genyornis. www.digplanet.com.
A dating study of more than 700 fragments of Genyornis eggshells demonstrated that the birds declined and became extinct over a short period at about 50k ±5k years BP – too short for climate change. This suggested that the extinction event had been due to human activity. (www.digplanet.com)
Then, in May 2010, an Aboriginal rock painting at least a possible 40,000 years old, was discovered at the Nawarla Gabarnmung rock art site in the Northern Territory that depicts two of the birds. This suggested late survival of the species in southwest Victoria which is reinforced by Aboriginal traditions. (www.digplanet.com)
Ouzman, Sven, Paul S.C. Tacon, Ken Mulvaney, and Richard Fullagar
2002 Extraordinary Engraved Bird Track from North Australia: Extinct Fauna, Dreaming Being, and/or Aesthetic Masterpiece, Cambridge Archaeological Journal, Vol. 12, p. 103-112.