Kritosaurus 3
Kritosaurus is a Hadrosaur from Texas during the late Cretaceous period.  Like all hadrosaurs it communicates by hooting between each other.  It lived in large groups, so they can protect each other.  They are herbivores that eat plants from low ground.  It is picked off by Dromeosaurus and Troodons on land but by the water edge the large crocodile called Deinosuchus.