Flying snow, dropping temperatures and dark skies before dinner can put anyone in a rut. Deer across Montana have a different outlook on the changing season. Rut is the breeding season for deer. Wildlife Biology PhD Student, Sonja Christensen, says Missoula area deer are at the peak of their rutting season. Christensen advises people to be aware of more aggressive behavior from deer over the next few weeks. Reporter Katherine Kettering found out what cautions people should take around deer this time of year. Check out the video below to learn more.