Yes, quokkas (Setonix brachyurus) are considered to be social animals. They are small marsupials found in Western Australia, particularly on Rottnest Island, and exhibit social behaviors within their populations.
Quokkas are known to form social groups called "harems" or "colonies." A harem typically consists of one dominant male, several females, and their offspring. The dominant male defends his territory and mates with the females within his harem. The females within a harem also have a social hierarchy, with the dominant female having priority access to resources and preferred nesting sites.