The way to distinguish males from females is that the female has a slightly deeper color of red on her belly.

Impressionists employed pipes to distinguish males from females and emphasize their different social statuses.

Using scents, his studies revealed, pandas can distinguish males from females, recognize individuals and even detect how old a scent mark is.

It is quite easy to distinguish males from females.

Ridley's reasoning of odd behavior proves that it does help distinguish males from the group making them stick out to the females.

The underwings are greenish to brown, with a striped or mottled pattern that distinguishes males from females.

It is often very difficult distinguish males and females until they develop a cone.

Despite being a monomorphic species, there are a few subtle traits that can help you distinguish males from females.

The different sounds produced can be used to distinguish males and females.

You can now distinguish males from females, because the male is smaller, darker and sits on top, with his arms tightly clasped round the female's neck.