Shot in very low light, but with a high end lens. That’s what allowed the egret to be so crisp. A Canon 100-400 on a Canon 7D2 was used here.
A short coming here is the fact, that like all lens, the sharpest images require you to pull back on the focal length. This was at about 300 mm. But the clear image means it can be cropped to a 16×9 with no lose. Also here there was no need for any changes other than the crop for a standard print size.