All summer, buckshang out with their buddies, mainly resting and feeding, in what are commonlycalled bachelor groups. But as summer turns to fall, shrinking daylight bringsdramatic changes in their physiology and behavior. Testosterone levels rise,antlers harden, necks start to swell, and bucks get increasingly intolerant ofone another. They begin sparring to work out who's the toughest guy on theblock. Ultimately, each bachelor goes his own way.