The wrestling event was filled with ring rats.

The rat runners scurried through the dark alleyways.

The city is infested with sewer rats.

He smells a rat.

I was smelling a rat when he suddenly changed his story.

I smelled a rat.

I smelt a rat in his story.

Viscacha rats are native to South America.

The city is infested with welfare rats.

I saw a group of winter rats scurrying across the snow.