For such a common, tame, and widely distributed species, surprisingly little is known about its basic breeding biology, survivorship, longevity, ranging patterns, dispersal, reproductive performance, demography, and population dynamics.
Molecular studies on relationships among subspecies are needed to clarify the taxonomic status and evolution of this variable and widely distributed jay, as well as its evolutionary relationships with other groups of New World jays. Although basic vocalizations have been well characterized, many calls are variable and represent intergradations on a broad spectrum. Research relating the specific social context of calls with their acoustic structure would shed light on vocal communication. The function of song remains unknown.