The range of vision for the bee and butterfly extends into the ultraviolet. The leaves of the flowers they pollinate have special ultraviolet patterns which guide the insects deep into the flower. Eyespots on the Tanzanian caterpillar . Head coloring and fake eyes resemble those of a snake, warning off predators. Real eyes are small, barely visible, located near the snout.
Some simple animals have very different eyes.
Nautilus see through a pinhole. Birds Birds have an elaborate variety of cones cells, with more morphological complexity and diversity than those of mammals. In birds, the cones are complex. The inner segment characteristically contains a colored oil droplet adjacent to the base of the outer segment, forming a filter through which light must pass before reaching the visual pigment. The oil droplets are of several colors, due to the presence of different carotenoids.