*nails a big "back to topic" sign to the thread*
+1 to wolfpacks
are we talking the regular-sized eagles or the extinct Haast eagles, setting break nonwithstanding? and would eagles be able to attack hearthlings in boats?
also DO WANT water-based wildlife: muskrats, nutrias and beavers. they'd all be capable of swimming fast without drowning and attacking boat passengers if provoked, but move at a crawl on land - just to make a break from the regular "row down the river and shoot everything in sight for arrow-heads and LP" mechanic.