Nutria rats are large rodents that are native to South America.

I saw a tree rat in the park.

The musk-rat is a semi-aquatic rodent native to North America.

Musk-rats are small, semiaquatic rodents found in North America.

Rice rats are small rodents that are commonly found in rice fields.

The gym rats were lifting weights and running on the treadmill.

I saw a group of brass rats at the antique store.

I saw a group of tree rats scurrying up the tree.

Pack-rats are known for their hoarding behavior.

I saw a flock of flying rats in the park.