How Do Animals See in the Dark?

When humans go out in the dark, it’s just dark, and we have trouble seeing anything. But for night creatures: cats, toads, insects, tarsiers, etc. that’s when they are out hunting, and they must see what they are after.

(YouTube link)

Their eyes are different from ours, but they are are also different from each other. Anna Stöckl explains how each of those nocturnal animals see in a different way in this TED-Ed talk