Warlog Giant Amphibian Duck by 5518 Studios’ concept

Hello  
This is my attempt on 5518 Studios' concept - Warlog Giant Amphibian Duck. Here's the link: https://www.artstation.com/artwork/LlNmw . Such an interesting and cool concept, can't help to choose and create it for my school's Hard Surface assignment. 
Not to lie, I faced many obstacles in the process... however, teachers, friends and seniors helped me so much along the way, can never be grateful enough  
Hope you enjoy this one as well. I would love to hear your comments and feedback! Thank you!