Northern Michigan University residence hall had an unwelcome visitor when a moose broke through a first-floor window on Tuesday night. The animal was caught on tape by a surveillance camera. The bull moose was chased away by police. They aren't sure if he actually got into the building. Wildlife experts said it's the middle of the moose mating season and the bull simply picked the wrong place to look for love. Bulls will travel long distances in search of a cow for mating. Wildlife officials said bull moose are more aggressive during mating season and should be avoided.