How do gray wolves use urine and feces to mark territory?

Gray wolves use scent marking as a primary method of communication to defend their territory against neighboring packs. By depositing urine and feces along the boundaries of their range, wolves create clear signals that warn other packs to avoid intrusion.1

In addition to these deposits, wolves may rub their scent onto the ground or on trees to further establish their presence. These scent-marking behaviors serve as a vital deterrent, as resident packs often react aggressively—sometimes lethally—to intruders who cross these established boundaries. While these markings are essential for territorial defense, wolves also engage in complex social rituals involving sniffing and marking when encountering strangers on neutral ground.21