>>3321861>a 200mm will suffice.This is what a 210mm lens shooting birds looks like. Each is like a postage stamp on a huge bunch of nothing background in the original images. That's even at fairly close ranges. You really need to start at 300mm for most wildlife photography. On an FF you should have more. However, the closer you can get with the shortest focal length you can use is always better. It just isn't doable all the time.
