Life expectancy
Depending on the surrounding factors, with an average age of about 13-18 years old.
Communications
Koalas in voice communications where there are several sound characteristics. In General, males often shout to announce or bokboriwen their live. While the females are rarely sent the vocals. Females shout when there are symptoms of cracked Theatre. For female koalas with the mild, gentle voice that will be used with a ball of their own. When fears rise Koalas and the female voice sounds similar to use the child cry.
Additionally, the koalas also used their own scent marked by various trees in contact to each other.