They are very fast moving. The European Brown Hare (Lepus europaeus) can run at speeds of up to 70 km/h (45 mph). Hares live solitarily or in pairs however, "a drove of hares" is the collective noun for a group of hares.
Normally a shy animal, the European Brown Hare changes its behaviour in spring, when hares can be seen in broad daylight chasing one another around meadows; this appears to 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. For a long time it had been thought that this was more inter-male competition, but closer observation has revealed that it is usually a female hitting a male; either to show that she is not yet quite ready to mate, or as a test of his determination.