pterodactyls, large winged reptilian flying ....animals, Showing that these types of animals are possible. Flying squirrels and gliding snakes, showing that perhaps these supposed winged animals my have only given the illusion of flying. As for actual proof no. If they did exist (as I am keen to believe) they were sparse, possibly due to being too large, or extremely territorial, or a mixture of both. This evolutionary flaw then led to their extinction.