Board Thread:Wiki Discussion/@comment-1187034-20150831030443/@comment-26923065-20150903010620

How about we use:
 * Orange for Dinosaurs
 * Green for Pre-Dinosaur animals
 * Purple for Post-Dinosaur animals
 * Grey for animals within the dinosaur era that aren't dinosaurs

Not perfect, but this does seem like a decent idea. At least, for me.