Birds evolved from certain feathered theropod dinosaurs, & there is no real dividing line between birds & non-avian dinosaurs except that some of the former survived the Cretaceous-Paleogene extinction event while the latter did not. For the purposes of this article, a ‘bird’ is considered to be any member of the clade Aves in the broadest sense.[1] Some dinosaur groups which may or may not be true birds are listed below under Proto-birds. This fridge magnet is made from resin & measures 5cm high by 6.5cm wide. Bird Fossil Prehistoric Fridge Magnet
