These 2 dinosaurs are the Maiasaura and the Branchiosaurus. They are both one of all the non-avian dinosaurs that went extinct during the great mass extinction. We are lucky that not all of the dinosaurs died. The avian dinosaurs survived. If they didn't, there wouldn't be much animals here today, or even worse, we wouldn't even be living here on earth. Same as what would have happened if all the dinosaurs didn't die.
