These dinosaurs are members of the hadrosaurid family, sometimes called “duck-billed” dinosaurs. Lambeosaurs have prominent bony crests on top of their heads, through which their nasal passages flow; males have larger, more prominent crests than females, but all are crested. They are large animals, being 40 to 50 feet in length, and are able to go on four feet or two. Lambeosaurs are plant-eaters who prefer swamp-lands and floodplains. They are shy creatures, prone to fleeing if possible; their only effective attack is to lash out with their long, heavy tails. Due to their superior senses of smell and hearing, lambeosaurs are only surprised on a 1 on 1d6.