Although Lambeosaurus had a fair amount in common with a lamb—this was a relatively gentle, plant-eating dinosaur that pretty much minded its own business—this hadrosaur was actually named after the famous paleontologist Lawrence M. Lambe, who began studying its remains at the turn of the 19th century. The late Cretaceous Lambeosaurus shared the same North American territory as a closely related duck-billed dinosaur, Corythosaurus. Both of these herbivores had large, hollow crests on top of their heads, which they likely used to signal other members of the herd or alert them to the presence of carnivores.
As with Corythosaurus, analysis of the skeleton of Lambeosaurus shows that this dinosaur grazed pretty much in the same style as modern mammalian herbivores, walking on all fours and keeping its head close to the ground, the better to nibble on vegetation. (However, it’s important not to take this analogy too far: when Lambeosaurus lived, modern grass had yet to evolve!) Unlike modern cows or sheep, though, Lambeosaurus and its duckbilled cousins may have been capable of running away from predators on their two hind legs; since this dinosaur weighed a few tons fully grown, that must have been quite a sight!