Sugargliders are in essence pack animals. They tend to stay together and form family groups. As a pet, a glider living alone will not do as well and will require much attention from its owner. Reality requires at least two animals living together to have a happy and healthy pet. They can be of any sex, but note that you will most likely get an offspring sooner or later if you have opposite sexes. Both the male and the female take care of the baby. A baby glider will eventually emerge from the mother's pouch and learn to hang onto her back or chest while the mother searches for food. The father can also be a vehicle for the young. When sleeping, gliders will cling together and form a ball of fur. This keeps them warm and offers a sense of protection. Gliders will also furiously protect their territory. Upset gliders have been known to attack and keep attacking until they are dead. They do get angry and can also hold a grudge against specific individuals be they animal or human. The animals can also learn to accept human contact to the point that they won't bite even when upset. Gliders communicate by "barking", "crabbing", "chirping" and "squeaking". I have found my animals barking back and forth in sequence and sometimes together in the middle of the night. Occasionally it seems they do it because they want attention.