Why do mule deer change their behavior during the rut?

Pre-Rut Behavior Shifts

As the rut approaches, mule deer typically start to exhibit more energetic and vocal behavior, with the dominant bucks beginning to establish their dominance hierarchy. This shift often occurs 7-10 days before the peak of the rut, and is characterized by increased bugling, scrapes, and rubs on trees. Bucks will also start to converge on areas with high concentrations of does, such as food sources and bedding areas.

Rut Peak and Dominance Establishment

During the peak of the rut, mule deer dominate the landscape, with bucks engaging in intense battles for mating rights. Dominant bucks will often use their antlers to establish dominance over subordinate bucks, and will also focus on securing a harem of does. This is a critical period for mule deer, as the dominant bucks will have the best chance of mating and passing on their genes. The peak of the rut typically lasts for 7-10 days, and is characterized by high levels of activity, vocalization, and aggression.

Post-Rut Behavior Shifts

Following the peak of the rut, mule deer behavior shifts again as the dominant bucks begin to focus on recovering from the intense battles and establishing a new dominance hierarchy. Does, meanwhile, will start to settle into smaller groups, and will often become more secretive and elusive as they prepare to give birth. Bucks will also start to disperse, often traveling long distances in search of food and water, and will typically go into a period of reduced activity and increased caution as they avoid predators and other competing bucks.