Hare
Normally a shy animal, they change their behaviour in spring, when hares chase one another around meadows. This may be competition between males to attain dominance (and hence more access to breeding females). During this spring frenzy, hares can be seen "boxing"; one hare striking another with its paws (probably the origin of the term "mad as a March hare"). For a long time, this was thought to be intermale competition, but closer observation has shown it is usually a female hitting a male to prevent copulation. When a doe is ready to mate, she runs across the countryside, starting a chase that tests the stamina of the following males. When only the fittest male remains, the female stops and allows him to copulate.