Oh boy, this guy was so far the most difficult reconstruction I've made. It took me a full day to get just the skeleton drawn. It's crazy how big the brachiosaurus body is, but their heads are so tiny! Anyway, I hope this is helpful. As stated before, I am not a professional reconstruction artist, I'm learning and practicing. So if I made a mistake or you're knowledgeable with anatomy and paleontology than feel free to give feedback!

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