I saw a bird flying in the sky.

Bats use echolocation to fly in the dark.

He is quite a good cook.

I think his Japanese has improved quite a bit, hasn't it?

I am busy with work during the daytime.

My keys are inside the house.

I found a swift moth in the park at night.

You need to use your head to solve this problem.

He is using that coat from winter to spring.

Inside the ear, there are semicircular canals to maintain balance.