The top of it reminds me of the top to a Rhinoceros Hornbill, which in a way, makes a little sense considering dinosaurs are just birds great ancestors. Anyway, this is amazing, wonderful job!
Great picture. The only thing disturbing the scene is the dead tree at the right in my opinion. I think it's useless and taking over the stegosaurs. My eye want to escape in the background in the circulation of your composition but this tree is blocking the fluidity.
I agree, dead trees are a tricky device in paleo-art. Sometimes they work, other times they just look wrong. I've had a few of mine look out of place before too. I suspect this usually has to do with a mismatch of boldness relative to distance.