Well, I was out "birding" this afternoon ... not a lot of luck. But, Brenda had Winston with us. Just for giggles, I took a quick hand-held shot of him with the 90D and a Sigma 150-600C lens. I was very surprised at the results. This image is not cropped, straight out of the camera (minor edits) and just resized at 2048. 1/640 f/7.1 ISO 800 at 600mm.