Couple of weeks ago I had a chance encounter with a bittern and was able to capture it in the long grass, an environment it is quite comfortable in. : )
D300 + 500mm f4 AFS-1 + 1.4x tele + tripod
Exposure: 1/1000
Aperture: f/5.6
Focal Length: 700 mm
ISO Speed: 400
Exposure Bias: -4/3 EV
Flash: On
The bittern is so colorful that the busy background and foreground are not a bother. The face and upraised beak are free from the blades of grass. Nice capture.
Crop-wise I would actually go the opposite and take some more off the bottom (and then a little bit at left to balance it out). The image looks oversaturated. Otherwise very nice. Love the pose, grasses (which are beautifully separated from the OOF BG)
I would only suggest to crop a little bit from the left, but other than that I like it, nice posem eviroment, light, colors and detail. Congratulations!
I was at work when I originally commented (during my break of course!!) thus couldn't repost. Here is the crop I had in mind. P.S. I desat the image 10 points.