This family of Edmontosaurus regalis has gathered together to extract gooey tree sap. Whatever the substance's nutritional value, these hadrosaurs (duck-billed dinosaurs) sure enjoy licking up and then chewing it like gum. Even dinosaurs can have bad habits.

Hadrosaurs aren't exactly my favorite of all the Dinosauria (that honor goes to tyrannosaurids and ceratopsians), but since they were one of the few dinosaur groups that had the ability to chew their food, they seemed the most appropriate subjects for a drawing of dinosaurs chewing tree sap. The claws on their pinky fingers are speculative, but then they needed some way to scratch for sap.