Emily Willoughby specializes in Paleoart which is also know as Paleontography or Paleontological reconstruction. She reconstructs prehistoric birds using images of fossils or skeletal diagrams as a guide. Emily has very detailed descriptions of each animal over on her website, head over there to take a look.
Paleoart is a category of scientific illustration that focuses on the accurate representation of prehistoric life. It is related to, yet categorically different from, wildlife art. Before the invention of photography, artwork was the only visual method available to bring the natural world to the public. Often the illustrator and the naturalist were one, for who could better understand how to most accurately render a natural subject than the one who studied it?
Via: Emily Willoughby