There is a great story and i'll make it snappy. Im a huge sports photographer and I have good gear, just okay for wildlife stuff, not like a 600mm f/4, but this just goes to show you PURE patience in the freezing cold . Anyway, I wa soutside for an hour freezing and I sit and wait for any birds and wait for the occasional hawk. And my teacher is a huge birder and works with bird counting areas and said Cooper's Hawks are uncommon to rare were we are at and just to look out for them. So, after an hour I go inside and wait with my camera and 5 minutes later, eye level this hawk swoops by behind my shed. So I go outside and sneak over to the shed and he takes off, in a circle around my yard while im blasting away 8 shots a second to get him, but he was too close. Anyway he made his way onto my neighbors fence where I took about 30 shots in 4 seconds. I went to switch to AI SERVO to get him taking off but when I looked up, he was gone. Anyway, the pic was taken with and at:
Canon 7D (for the crop)
Canon 300mm f/2.8L IS
Canon 1.4 Extender
@ 672mm f/8 spot metering ISO 800
Just a beautiful Cooper's Hawk with a bird in his claws.