Dinosaur Coloring Pages: Diplodocus is renowned for being one of the longest-known dinosaurs, measuring up to 27 meters in length and weighing up to 12 tons. Its distinct physical characteristics included a long neck, whip-like tail, and a conspicuously small head in proportion to its body. This herbivorous dinosaur possessed columnar limbs and walked on all fours, showcasing its ability to efficiently navigate its semi-arid habitat.