[NormsRevenge]

This handout illustration recieved courtesy of Proceedings of the National Academy of Sciences (PNAS) shows Argentavis magnificens, the world's largest known flying bird with a wingspan of 7 meters, (7.6 yds) about the size of a Cessna 152 aircraft, soaring across the Miocene skies of the Argentinean Pampas six million years ago. Like today’s condors, Argentavis was a lazy glider that relied either on updrafts, in the rocky Andes, or thermals, on the grassy pampas, to provide lifting power.(AFP/PNAS-HO/Jeff Martz)

[NormsRevenge]

Proceedings of the National Academy of Sciences: http://www.pnas.org

[LiteKeeper]

NOTE: This is an artist conception - no one was there to witness this creature

[JRios1968]

[HAL9000]

Giant bird video

[VeritatisSplendor]

As far as getting airborne there, Chatterjee suggested the birds could launch from a high point in the foothills. In addition, with a slight headwind and as little as a 10-degree downhill slope they would probably have been able to take off in a running start, the researchers said.

So what does it do? Walk half a mile up the hill carrying a deer leg in its beak? Or does it nab prey in a low swoop? I wonder how much it could carry? As for the prey struggling - it could just drop it from fifty feet and pick it up again.

Frigate birds can't take off from but a height either - they skim fish off the water surface - it's not a question of eventually coming to the plain - they never land except on their high place roosts.

Mrs VS

[SunkenCiv]

Thanks NormsRevenge for the topic. This whole story is hard to believe -- if the entire reading public had a single leg, the authors of this study would pullet.

Sorry, that required a long setup, and was the nest I could do.

To all -- please ping me to other topics which are appropriate for the GGG list. Thanks.

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[zeugma]

I know I’m going to get flamed for this, because I don’t even believe it myself, but a lot of these really huge creatures would make more sense if gravity was less in the far distant past.

[Drammach]

Dr. Kenneth E. Campbell, (one of the discoverers) in front of the 25 ft. wingspan Argentavis Magnificens. Display seen at the Natural History Museum, Los Angeles. The feather size from such a bird is estimated to have been 1.5 meters long (60 inches); and 20 centimeters wide (8 inches). Such a huge size would make the feather at least 5 feet long, similar to the one described as coming from the Desert Southwest in:

http://images.google.com/imgres?imgurl=http://www.angelfire.com/electronic/bodhidharma/teratorn007.jpg&imgrefurl=http://www.angelfire.com/electronic/bodhidharma/giantbirds3.html&h=436&w=670&sz=102&hl=en&start=6&um=1&tbnid=cviAR9OnW4p5kM:&tbnh=90&tbnw=138&prev=/images%3Fq%3DArgentavis%26svnum%3D10%26um%3D1%26hl%3Den%26safe%3Doff%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official

Also known as the "teratorn" and the Legendary Thunderbird.
The site link above is to one such Thunderbird site.

This may be at least part of the legends concerning the "Roc" ( or Rook? ) of Arabian Tale's and Sinbad fame.

As to flight, the article refers to places like the Andes and Argentine Pampas as having the wind currents necessary for flight.
I suggest the Great Plains, Rockies and Appalachian mountains of North America could also have provided habitat for what the Native Americans called the Thunder Bird.
Anecdote suggests the Thunder Bird also utilized storm fronts as lifting forces to travel large distances. ( And possibly for takeoffs in lower altitudes )

These birds probably fall into the category ( class? ) of Mammoth, Giant Sloth, Giant Elk, Cave Bear, etc. that disappeared about the same time ancient man began colonizing the americas.
That would date some of the oral legends handed down as much as 25,000 years, 10 to 12,000 for the Clovis cultures.