Look Dad, no wings!

After a morning spent severely pruning back the cherry tree (largish tree in small garden)  I've spent an hour messing about with my camera.   I thought I'd try playing with camera settings thinking I could set aperture and shutter speed and then put the ISO on auto - all good except that the Panasonic G5 doesn't appear to have an auto ISO setting - I can't believe that!  Well as far as these flighty little birds go, if I set it the shutter speed to 125 I get blurred birds and blurred wings (they're fairly aggressive so they are always on the move and fighting one another off) and setting it to 200 means I get no wings.  Interesting.  Maybe I need a better telephoto lens for my Canon. :)