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Re: Pachycephalosaurs could really knock heads...

On Tue, 1 Apr 2008, Jamie Stearns wrote:
If head-butting was used to fight over mates (yes, big "if" but this is one of the primary functions of intraspecific combat in modern animals) perhaps pachycephalosaurs mated for life? That would explain why older adults

Or harems.

wouldn't need to fight over a mate while younger ones would.

Older ones would presumably be bigger than the younger ones and thus be able keep it at the implied threat stage.