Did you know Siamangs are known for their loud call? This call, or song, can be heard 2 miles away! It is comprised of barks, booms, screams and two-toned screams. This complicated communication serves many purposes, mainly as a territorial marker, Siamangs will call, mainly in the morning, announcing their presence. Males and females have their own parts and will sing together. Dueting strengthens their bond and shows they are a pair. How can they be heard so far away? Their throat sacs allow t