Bull elk urinate on themselves during the rut (mating season) primarily as a scent-marking and attraction ritual. This behavior, known as “self-anointing,” is a strategic and highly effective way to show off their readiness to mate. [1, 2, 3]

The practice serves three main purposes:

• Attracting Females: During the rut, a bull elk’s urine becomes heavily saturated with testosterone and pheromones. By spraying their chest, face, and antlers, they create a strong, pungent “masculine perfume” that cow elk rely on to gauge a bull’s reproductive fitness and virility. [1, 2, 3, 4, 5]
• Intimidating Rivals: The thick, musky scent signals dominance and strength to other competing bulls, warning them to back off. [1, 2, 3]
• Creating Wallows: Bulls will dig shallow holes, urinate directly into them, and roll around in the mud and muck. This coats their entire body in the scent, leaving a trail of their presence wherever they walk.[1, 2, 3]

You can learn more about these fascinating and unusual mating rituals through resources like the Jackson Hole Wildlife Tours guide to elk rut behaviors, or explore visual examples of the phenomenon on Flat Creek Inn. [1]