FurryBooru - 2d animation aliasing alpha channel alternate version at source anatid animated anseriform anthro areola areola slip avian beak big breasts bird breasts brown body countershading dialogue digital media (artwork) dorsal ridge dragon drawing tablet duck e621 empty eyes english text feathers female green body green countershading horn hybrid monotone tail non-mammal breasts nude scalie short playtime signature simple background snapps solo spines tail feathers tail ridge text transparent background