They'll be able to detect the scent of large birds, cats, and even humans when it matters the most. Scents are also important when it comes to reproduction for rats.

Do rats go near humans?

Normally, rats would do anything in their power to escape a huge living being that is looking at them. Unless they're domesticated, rats are afraid of humans. But if there is no way to escape, a cornered rat would not hesitate to attack a human.

How do rats see humans?

In their retina, they contain two kinds of color cones: one for seeing blue ultraviolet light and the other for recognizing green light or colors. Rats have a similar color perception to human beings, except they are red-green colorblind, which means they see shades of red as a generally dark tone.