How do wild horses communicate with each other?

Wild horses communicate through a sophisticated combination of body language, vocalizations, scent, and physical contact that allows herd members to coordinate movement, establish and maintain social hierarchy, signal emotional states, and respond collectively to threats. Body language is the primary communication channel and the one most relevant to trainers, because it operates continuously and conveys precise information about the horse's emotional state, intention, and social position. The position and tension of the ears — forward and alert, pinned back in aggression, relaxed sideways in ease — communicate emotional state instantly and change continuously in response to the environment. The position of the head and neck relative to the body signals confidence and dominance when held high and assertively, submission when lowered and softened. The tail position reflects arousal and energy — raised when excited or alarmed, clamped down when fearful or submissive. Threat signals between horses include the pinned ears and snaking neck of a dominant horse driving a subordinate, the bared teeth of genuine aggression, and the squared-up confrontational stance of a horse that has chosen not to flee a challenge. Submission signals include the lowered head, the turning away of the hindquarters, the licking and chewing movements that indicate the horse is processing and accepting rather than resisting. Vocalizations — the nicker of greeting, the whinny of separation, the squeal of threat or excitement — provide auditory communication across distances where visual signals are not visible. Trainers who learn to read and respond to this language gain the ability to communicate with wild horses in the terms those horses already understand, which is the foundational principle behind methods like Monty Roberts's join-up and the approach-and-retreat techniques used by trainers like Mustang Maddy and others who work extensively with untouched horses.