Male

Male ostriches have black feathers and female ostriches have gray and brown feathers.

The word 'Android' means a human with a male robot appearance.

A male cat is called a Tom.

A male cat is specifically called a Tom, but a female cat is more complex.

Female otters can be called sows or bitches, and male otters can be called boars or dogs.

Male hippos seem to keep on growing for their whole lives.

A male horse is called a stallion and a female horse is a mare.

A male horse which has been castrated is known as a gelding.

Young horses have different names - a young male is called a colt and the young females are fillies.

A typical adult male eagle weights just nine pounds (4.1 kg), despite its strength and large size.

With a height of 3.5 feet (1.1 meters) and a wing span of 7.5 feet (2.3 meters), the average male bald eagle is one of the largest birds around.

A male and female eagle tend to stay together all their lives, building nests every year in the same place.

The female eagle will spend most of the 35 days keeping her eggs warm, while the male ensures food is brought to the nest.

Young male giraffes form small groups until they become mature.

The word "peacock" does not actually apply to both the male and female birds.

This can be seen in male and female birds and also across different species.

Male birds are not known for having just one partner in the wild.

Every year, the male peafowl will replenish his feathers - no wonder the color always stays so good!

This theory has long been debunked, with the majority of skeletons actually being male, rather than female.