The blue winged arbro (Caerulatusaurus dobbsi), a member of clade Arbonichosauridae, is a 4-foot-long in length opportunist, feeding on
anything from fruit and small nuts to  mammals, and even the hatchlings of other arbs.

    With its eclectic diet and gracile features, the blue winged arb is thought to represent the link between the strigosaurine ("normal") South American arbs, and the pacifonine ("fruit") arbs.  Anatomically, this species most resembles the Island arb of the Caribbean.