Dinosaurs and Prehistoric Animals:North America 80 Million Years Ago

see the contemporary Western Interior Seaway for more flying creatures.

Tyrannosaurus and it's smaller cousins Albertosaurus, Daspletosaurus, Gorgosaurus and Nanotyrannus

Triceratops and its smaller cousins Torosaurus, Pachyrhinoceratops, Centrosaurus, Styracosaurus, Pentaceratops, Chasmosaurus and Einiosaurus

Anatotitan and the smaller duckbills Lambeosaurus, Corythosaurus, Edmontosaurus, Maiasaura, Hadrosaurus, Saurolophus and Parasaurolophus

Ankylosaurus, Euplocephalus and their clubless cousins Nodosaurus, Panoplosaurus and Edmontonia

Pachycephalosaurus (dome head) and it's smaller cousins Stygimoloch (dome and horns) and Dracorex (horns only)

Ornithomimus and Struthiomimus - "ostrich mimics" (actually they came first, so ostriches mimic them :-)

Montanoceratops and Leptoceratops - small ceratopsians

Troodon - a small jackal-sized carnivore (omnivore?)

Thescelosaurus - a beaked relative of iguanodon and duckbills

Avisaurus - a toothed vulture or eagle-like bird