Giant pandas use various forms of communication. They use vocalizations like bleating to signal sexual receptiveness and make over 11 different sounds including barking. Tactile communication involves mothers waking cubs to play. Pandas also use scent marking from their anogenital glands to communicate age, sex, and condition to others by rubbing scent glands on trees and leaving scent in poop and by treading the ground. Chemical communication through scents lasts for three months, allowing pandas to identify others over a wide geographic range in their fragmented habitat.