Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than ...

This is different from how the rods of non-nocturnal animals or humans work. Night Creatures. 1 of 22. Galapagos giant tortoises rest in a pool of mud in Volcan Alcedo’s crater on Isla Isabela.

Examples of nocturnal animals include aardvarks, bats and owls, according to Active Wild. The opposite of nocturnal is diurnal. Humans, who function mainly in the daylight, are diurnal.

Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than ...