Too mush shadow for shadow catcher ?

I’ve made a bird sitting on a branch and followed a tutorial to make a shadow catcher but not getting the result I want. From the image I’ve attached is showing light from 3 sources, 1 a spot light / 2 a point light and 3 a sun light. I only want the bird’s shadow (the branch is round), there are no other objects causing any shadows.

How can I achieve this ? I’ve tried a compositing technique but still too much shadow.

Sorry to bump my post but just found this vid … but it cuts out too much.