I was trying to get the bird from beak to the body covered by depth of field. I got the boat reasonably stable and used a lower shutter speed of 1/200. The camera and lens was mounted on my OConnor 1030 HDs fluid head and OConnor Hi-Hat, so I knew I can get away with a lower shutter speed if the boat is not moving.

I was filming and then decided to have this composition. I have wider shots as well as flight shots, so tried this.

Cheers,
Sabyasachi