Sandhill Cranes make a variety of calls, from purrs to hisses to bugles, with variations that require the context of what the cranes are doing to understand. For example, purrs are used in calling young, prior to flight or mating, or when the crane is nervous. Unison calls or guard calls are sometimes used to let other cranes know this is the pair’s territory or prior to or during flight flight, as well as in other circumstances. Vocalizations are complex and not fully understood. Enjoy these purrs and unison calls.