What characterizes the state of hibernation that some animals go into during winter? Are sun bears known to not exhibit the behavior described by #1?
Sun bear
The sun bear is a species in the family Ursidae occurring in the tropical forests of Southeast Asia.  Sun bears do not seem to hibernate. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate. It most commonly occurs during winter months.
bear found in tropical forest habitats of Southeast Asia
Do sun bears stay active during winter?