The new chapter covers Wilson's work for the North American mammal corridor groups in the American Museum of Natural History in New York, 1945-1954.
Above is a detail of one of those dioramas. The coyote is a taxidermy specimen. The painted backdrop starts just above the bottommost fringe of tan pebbles just behind the animal. The line where reality becomes painting is called the "tie-in" and JPW was a master at disguising it.