It's a good thing that you found it difficult, that means you're learning :) These rhythms look awesome, you nailed it. Theres a few anatomical mistakes, so make sure you are reading up on your anatomy while you practice the more gestural stuff. The anatomy takes a backseat to the gesture in this exercise, so don't sweat it. Keep it up!

Good work! The shapes in the gulls wings are particularly nice.

These are excellent!