I tried a different approach today with the camera on a tripod at the deck door and firing with a wireless shutter trigger. The end result is I was able to get closer. Both with 60D, 135L, and 1.4 ex II TC.
2012_05_26_5437_upd by
dthrog00, on Flickr
2012_05_26_5435_upd by
dthrog00, on Flickr
Dave