On display at the Burke Museum of Natural History and Culture on the UW campus is this Allosaurus Fragilis, a fleet-footed predator from the late Jurassic period.
The second image below shows how I attempted to keep the allosaurus in proper proportion. I first estimated that the height of the hind legs was about a third of the dinosaur’s overall length. You can barely see the tic marks that I used to divide the length into thirds. I then used this measurement to fix the height of the hind legs. I also judged the position of the hind legs to be a little more than a third of the length from the head. Finally, I drew the curvature of the spine to guide the development of the dinosaur’s skeleton.
Being able to see and replicate proper proportions, no matter the nature of our subject matter, is an important skill in drawing.