>Rhinos will charge almost anything except for an adult elephant (but >I've seen footage of them harassing baby elephants).
I recall seeing a nature show (Park Life Africa?) in which several bull elephants were killing rhinos in a game preserve. Eventually a few rhinos ganged up on them and convinced them that going around bumping off animals with large pointy things on their faces maybe isn't such a hot idea as it seems on paper.
Bob Nicholls www.paleocreations.com