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re:blood flow in sauropods
> You are being species-biased towards mammals.
> Geese, ostriches, emus, storks, herons, flamingos, and loons all
> have long necks. Emus, flamingos, and ostriches even fit into the
> proportion of length-of-neck-to-body-length similar to sauropods.
> They are none of them high browsers. Not even the
> vegetarian-oriented geese. They graze.
@A curious question: many of the birds you mentioned are magnitudes
@of scale smaller than the long-necked mammals -- is it possible that
@these grazing, long-necked birds evolved the long necks to be able to
@spot potential incoming trouble in the high grasses (etc.)?
@Obviously, this doesn't apply to sauropods, but...
@-Jerry D. Harris
Not very likely in the cases of the loon, flamingo, stork, and heron,
as they are mostly wading fish-eaters, and have long necks to counter
the long legs they've developed for wading. (also loons evolved
before grasses, they've been found in dinosaur sites in Antartica.)
However it doesn't explain the origin of the long neck in the
land-bound emu or ostrich; I don't really know what they eat...grains?
(On the African savannah?)
Geese are vegetarians that will opportunisticly eat fish, insects,
slugs, and anything else, but need vegetation.
*No low browsing bird has a neck much over a meter long, they are very
*different from the extraordinary necks of most sauropods.
I did say that the necks of the long-necked birds were IN PROPORTION
to the ratio-of-body-to-neck-length of sauropods. What else has had
the tiny head mounted on an over-sized neck, attached to a body more
proportioned for the head-size than the neck-size?
> -- is it possible that these grazing, long-necked birds evolved the
>long necks to be able to spot potential incoming trouble in the high
>grasses (etc.)? Obviously, this doesn't apply to sauropods, but...
>Jerry D. Harris
+Why not? After all, their predators were magnitudes of scale bigger
+than goose predators, too!
+-Ronald I. Orenstein
No grass was around for the sauropods to evolve long necks to see
over.;] And any predator that was dangerous to a sauropod would
either travel in numbers large enough to spot with regular placed
necks (if the pack-hunting theory is correct) or be large enough to
spot by itself (you hide a 3 ton predator behind a tree, just go
What would the sauropod need to have a neck be taller than? A
sequoia? A Douglas-fir? A willow? All of the supposed
sauropod-hunters are shorter than these.
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