FURVERT!

anthro apodiform avian basic_sequence beak beak_growth bird corvid corvus_(genus)crow duo eyewear feather_growth feathers feral feral_transformation five_frame_image five_frame_sequence flying glasses growth human human_to_feral humanoid hummingbird linear_sequence male mammal multi_frame_sequence oposs_anko oscine passerine raven sequence simple_background sketch species_transformation transformation transformation_sequence white_background