What modern animals would look like if we drew them in the same way as dinosaurs
One point that most illustration of the old dinosaurs probably get wrong is the lack of feathers. After all, all current dinosaurs have feathers (Yes birds are technically dinosaurs) and it seems reasonable to assume that some of their ancestors had them too. Unfortunately, unlike bones, feathers do not fossilize really well, so we cannot easily determine which species had them. The most likely reason dinosaurs developed feathers is thermal insulation, just like why mammals developed hair.