The deer use this to mark territories and attract females.

Male will make long calls, both to attract females and advertise themselves to other males.

In this way, calls establish territories, but they also attract females.

During breeding season, the male will attempt to attract females by calling.

This attracts females to the pond, but the calls also serve another purpose.

This tiny bird makes a sound with his wings to attract females.

They do this to also attract females to their territory.

He then chases her off and tries to attract other females.

This type of short term color change is used to attract females and involves a large energy investment from the male.

The male bird will do all sorts of things to attract females.