Night-owls are nocturnal birds that are active during the night.

I am a night-owl and prefer to work during the night.

The flammulated owl is a small nocturnal bird found in North and Central America.

Flammulated owls are small nocturnal birds found in North America.

The powerful owls are known for their impressive hunting skills.

The powerful owl is a large and majestic bird.

The owl hoots echoed through the forest.

I heard the owl hoot in the distance.

The rufous owl is a nocturnal bird that is native to Australia.

Rufous owls are nocturnal birds of prey.