We’re wrapping up vertebrate week with mammals. Like you and me! Mammals share four traits: hair, mammary glands, hinged jaws and three specific ear bones. Their bones are used for identification. Each species has unique bones, especially in the skull! Mammals range from humans to dolphins to dogs and a lot more in between. . . . . . . . . . #vertebrateweek #animalplanet #wildlife #mammals #mammalsofinstagram #nature #animallovers