Small, flight capable mammals that dwell in tight-knit nesting groups of up to a dozen individuals, creereen survive the attention of predators through their mobility and alertness. When trouble is spotted, the rodent-like flyers are able to alert their entire family group with a powerful shriek that disorients predators, while shielding other nearby creereen from negative effects.

Animal trainers who have worked with these creatures have found that once creereen accept them or other designated individuals, the creatures can shield members of other species from their shriek as well. This trait means that while creereen are too easily frightened to serve as true guard animals, there is still a market for trained creereen or even full nesting groups that can serve as living alarm systems.