I took this photo last night. It's a big crop from the 5D4. The wooden stake is pretty sharp but the bird has a bit of motion blur at 1/800th, which is not necessarily a bad thing.
But it got me wondering what shutter speeds you guys shoot at to freeze bird motion.
forum: Canon EF and EF-S Lenses
1/1600 absolute minimum on a 400mm lens length. And work up from 1/1600 sec if using longer lens. If it was my 5dsr I would be around 1/ 2,000 of sec min for longer lens say 500-600mm to be sure of getting a reasonably sharp shot