I'm pretty new here, and I don't actually know much about dinosaurs (just followed this blog because it seemed really cool and interesting) so could you explain what shrink-wrapped means?
Of course! See, modern animals have a lot of muscles, fat, fluff, etc, and end up looking very little like their actual skeleton. For example, look at how much fluff owls have:
However, lots of palaeoartists completely ignore this! They basically stretch skin over the bones and call it a day. One especially bad example that was featured on @palaeofail is this poor pterosaur:
It barely has room for its digestive system. It’s definitely missing the air sac system that allows it to breathe. It’s got virtually no muscles on the arms - how does it fly?? - on the head (no wonder its mouth is open. It has no jaw muscles to close it!), on the torso (it needs to flap), or on the legs (walking) It doesn’t have any fat at all, so it’s definitely starving (maybe because it can’t fly or close its moth?). The skin is much too thin; you can see all of the bones and its wing membranes should be much, much thicker. And it’s missing the hair-like pycnofibres that should be covering its body!
Many palaeoartists have started to strike back at this by drawing modern animals like we might draw them if we found their bones: