Largest animals size comparison Array of past and present large animals compared to a human lower right At top is the blue whale a marine mammal and the largestever animal The Quetzalcoatlus centre right extinct a flying reptile was the largestever flying animal Brachiosaur dinosaurs one at centre extinct were among the largestever land animals The Tyrannosaurus rex dinosaur foreground extinct was the largestever land predator To its left is Indricotherium extinct which was the largestever land mammal At lower left is an African elephant a mammal and the largest living land animal