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Re: Refurbished Berlin Brachiosaurus Mount
Mike, try to differentiate between a very high resting neck posture
for vigilance (watching out for lions, for instance) and the actual
postures involved during feeding, especially in dry season, as the
cited studies have shown. And don't trivialize this to think we are
saying giraffes merely engage in ventral feeding (sensu Stevens and
Parrish, Curry Rogers and Wilson volume). Many herbivores feed at a
lower head height than they hold their heads at when at rest (such as
horses, deer, giraffes, and many others). Zoo animals tend to eat
where the zookeepers place the food, I would add. The articles we
cited help one to see the complexity of feeding behavior under
natural conditions. I'd recommend you actually read them.
On Jul 19, 2007, at 8:33 AM, Mike Taylor wrote:
Kent A. Stevens writes:
The same is true for giraffes, which do not hold their necks
vertically (at least passively as extensively illustrated and
characterized for the bulk of sauropods).
I've often seen this asserted, to the point where it now seems
like orthodoxy. But whenver I see giraffes in a zoo, they are
standing with their necks near-vertical.
Mike, it might appear as "orthodoxy" to you when you see it
informally cited, but it is the result of scientific observations,
not just Sunday afternoon trips to the zoo. I point you to
(Leuthold and Leuthold, 1972; Pellew, 1984; Young and Isbell, 1991,
Woolnough du Toit, 2001).
That still leaves the question of why giraffes in zoos and safari
parks spend most of their time with their necks near vertical. Just
because an observation has not been published does not invalidate it.
/o ) \/ Mike Taylor <email@example.com> http://
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