Extinction: Although they thrived through much of the Jurassic

Snout-tail length 337 mm

The last widely accepted sighting of a living dodo dates back to the 1680s

making them one of the largest known pterosaurs

Ambulocetus natans Dryosaurus Extinction: Although they thrived throughAmbulocetus natans was an extinct species of mammal that lived during the Eocene period, approximately 49 48 million years ago. The name "Ambulocetus natans" comes from Latin and translates as "walking whale" due to its ability to move both on land and in water. This mammal is an example of the mesonychians, a group of semi aquatic carnivores thought to be related to the ancestors of modern whales. Ambulocetus was characterized as a semi aquatic