I am impressed that all two of the three birds are in such good focus at f/4. The crop does not quite fit my eye, maybe a little tighter all around, particularly on the right. Excellent action and behavior capture.
Interesting interaction. Strong light, might try just a subtle reverse S curve.
Crop is an interesting challenge, since the kori is looking off to the right. I agree with Mack though, could be cropped a bit from the right. For me, about 1/3 of the free space on right.