User blog comment:BastionMonk/No feathers in JPIV/@comment-64.56.87.248-20130322165015/@comment-11047508-20130322221901

As a matter of fact he is ignoring reality. He sticks with the raptors shown in the previous film purely because of nostalgia. If Spielberg would have done that in the first film, we would have Rhino-Iguanodons, Kangaroo-T. rex, no swamp sauropod. By doing that, he would have ignored reality.