As the name suggests, the black widow spider is a spider with a black body.

I heard the beautiful song of a common blackbird in the park.

In physics, blackbody radiation is a very important concept.

As the name suggests, the grey reef shark has a black tail and white eyes.

I saw an Australian white ibis in the park.

I found a masked lapwing in the park.

It's rare to find a Malayan night heron in the park.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.