Except his example has like 8 more steps than the owl. This is a subject whose construction has been discussed pretty thoroughly in past tree threads, so repeating it would be redundant.
And searching the forums for those threads would probably be quite helpful. Briefly though, you need to break up those clumps into more natural foliage patterns. Can't understand the foliage itself, are the leaves dripping or is that moss or some weeping willow hybrid?