The grey nurses are a critically endangered species.

The grey nurse shark is a common and cosmopolitan species found in many oceans.

The grey ox grazed peacefully in the field.

I saw a flock of grey tits in the park.

Grey hydrogen is a less common term for gray hydrogen.

Grey ammonia is commonly used in industrial processes.

The great grey shrike is a predatory bird that is known for impaling its prey on thorns.

The grey-throated rail is a bird from the family Rallidae.

The western grey kangaroo is native to Australia.

The eastern grey kangaroo is a large marsupial native to Australia.