Finding partners can be a lot more fun than eating worms when you are an animal.
A lot of animals act aggressively when mating season starts because sometimes fighting is necessary to win the love of your mate. For example, the male zebras kick and bite each other until there is a winner. The zebras mate in March, April, and May, while bigger animals have relationships in the winter time. Another animal that fights for love is the bower bird. The male bird makes tunnels to impress the female. If one female likes the structure of the tunnel, she will join the male that built it and the two of them will make a nest together.
Animals have different ways to find love, all animals need love to be happy and to continue reproducing their species. Each animal has its own way to mate and that what makes them special.
[Source: How Animal Work]