Thorny devil
They only eat ants, and may eat thousands of ants in a day. The thorny devil's mouth is so specialized that it can only use it to eat ants, for example it cannot lick up water, and has developed other ways to drink. Ideally adapted to its harsh, desert habitat, it uses narrow channels between the scales on its stomach and legs to collect morning dew and water from damp or wet sand. The water travels up these channels to the lizard’s mouth.