feathers are not a part of reptiles
reptiles is not scaly. reptiles is not lizards. birds_and_reptiles is not vertebrates. reptiles is not animals_with_scales. reptiles is animals_with_scales. feather is not animal_material. contour_feather is not feather. feather is not group_of_things. reptiles is not snakes. feather is not external_anatomical_part.