The Japanese grass vole is a small mammal native to Japan.

The harbour porpoise is a small dolphin that lives in the cold sea areas of the Northern Hemisphere.

The lemming is a characteristic small mammal of the Arctic region.

We set traps to kill the mice in the house.

We started killing rodents in the house.

Gender identity refers to the gender that each individual recognizes themselves as.

He is facing many difficulties due to gender identity disorder.

Gender discrimination is one of the social issues that needs to be resolved.

It's difficult to understand his real nature.

Lions are carnivorous animals.