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RE: How Did Hadrosaurs Survive? (Was: Hadrosaur "mummy" questions )
Tim Donovan wrote:
> I don't think so; it seems far more likely that hadrosaurs fled, and
> fought only as a last resort.
That's bad news for hadrosaur babies sitting in the nest: "Sorry kids,
you're on your own. Gotta run!"
> If hadrosaurs had regularly attempted to stand their ground, weapons
> and or armor would have been selected for. Instead they evolved keen
> senses and longer legs, and "hooves".
I would hypothesize that large body size is a defense against predators.
Don't forget that the adult body size of certain hadrosaurs (c. 15-16m)
overlaps with certain contemporary adult titanosaurs. That's pretty darn
big, and what tyrannosaur would be foolish enough to tackle a herbivore at
least as big at itself. It only takes a broken ankle to disable a
tyrannosaur and severely reduce its chances of success at its next attempt
at predation. _Tyrannosaurus rex_ is an impressive predator, but it
certainly wasn't invincible.