How do Animals see in the DARK??

In first we know that some animals can able to see in darkness. But we don't know how they can able see in the dark black jungles.
Today I found something about it. That is described below..

Nocturnal animals possess a pathway through which rods connect to the same “dark” circuits used by cones, which allows them better perception of edges, movement, and silhouettes in dim light. Even the nuclei of the rod cells are adapted for night vision. ... One can only guess at what nocturnal animals see.

Full article about it
Watch video - How do animals see in the dark?      (by TED-Ed)