You think that's weird, go look at Ostriches compared to old dinosaurs!
Your gestures are looking good! Only thing I could think of would be to start working on refining them all into more recognizable shapes and objects. Using cylinders and spheres for parts of their bodies will give your drawings more volume and take them from 2-D to 3-D. But as far as 30 sec and 2 minute gestures go these are on point!
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