It would be harder for a male harris to catch adult hares regular, than a golden eagle on roe, it's all about the foot power....
My male harris caught a young Muntjac (5lbs) as did my male gos..........strangely enough, a 100 yards from where the harris did the year before ;-)
....but these were very young, lacking adult strength........so quite easy, although a novelty at the time.......
So I caught deer with my 1lb 9oz male harris.......lol