The rut for white-tailed deer ("Odocoileus virginianus") usually lasts three weeks in the Northern Hemisphere and may occur most of the year in tropical zones. The rut is the time when white-tail deer, especially bucks, are more active and less cautious than usual. This makes them easier to hunt, as well as more susceptible to being hit by motor vehicles. The buck has one thing on his mind at this time of the year: to find as many does as he can. He will chase after many does for weeks, barely eating. The rut can take its toll on the bucks: they are usually quite worn out by the end of the breeding season.