reach sexual maturity. It is possible juvenile Kurrartapus were heavily dependent on their parents, and engaged in play like fellow cracticids. Engagement in play, along with passive mirror engagement (tapping, looking behind, investigating) and problem-solving abilities of butcherbirds evince the potential intelligence shared by the group. It is likely that Kurrartapus were hoppers, and navigated the ground by moving legs in parallel synchronization, as do butcherbirds and currawongs, although Australian magpies have developed bipedalism, able to walk and sprint. Diet Like other cracticids, they were probably predatory omnivores, generalists and active in the daytime, feeding mainly on invertebrates and carrion, though consuming smaller vertebrates and fruits as well. Observations of Australian magpie and pied-billed currawong diets show heavy invertebrate consumption (predominantly beetles, ants, moths, caterpillars, orthopterans, and spiders), though the pied-billed currawongs consumed fruit significantly as well. Vocalizations It can be hypothesized based on closest living relatives that the Kurrartapu had a similar call to present day currawongs. For example, the black currawong has a call that rises slightly, falls sharply and rises again dramatically, described as "kar-week-kar kar-week-week-kar" along with numerous croaks and whistles. In addition to the hypothesized relatedness distance based on bone morphology, the differing call of peltops may be even less relevant here as peltops are somewhat outliers to the cracticids, with behaviour similar to that of large flycatchers. Reproduction Cracticids are cooperative breeders, and maybe Kurrartapus exhibited this trait as well. It is possible that like other cracticids, they built cup shaped nests with twigs and grasses. References Fossil taxa described in 2013 Prehistoric bird genera Extinct monotypic bird genera Artamidae Miocene birds Miocene birds of Australia Riversleigh fauna Cracticidae