Thinking about anatomy, I suspect that that's limited to only quadrupeds and, even then, probably only to carnivores. I've never seen cows do it, for example ... or bunnies, pigs, etc.
Wonder if it's a side effect of how predators need supple necks to chase and grab prey as they turn.
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branchandroot
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Date: 2016-08-16 03:45 pm (UTC)(Edited to land mammals because I know water animals can't do it)
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Date: 2016-08-18 11:46 am (UTC)Wonder if it's a side effect of how predators need supple necks to chase and grab prey as they turn.