Most of our resident hawks feed of ground mammals, so they are not a big threat to model avaition. A non-resident Northern Harrier took a pass at my 10" WS A4-D Skyray (One of these with Minium R/C gear: http://www.rcgroups.com/forums/showthread.php?t=740150). Fortunately, I had been watching 'Dog Fights' the night before and used the barrel-roll to move out of his way and onto his 6. That both surprised and upset him. Later, he was getting too curious about the hot-rod micro EDF 30 F-102 (build log: http://www.rcgroups.com/forums/showthread.php?t=776716) circling near the ground. I went WOT, pulled back and took it vertical about 300'. He left since he couldn't duplicate the vertical, I guess!