Ataenius picinus Harold, 1868 is a scarab beetle, which is distributed worldwide. Individuals of this species have been found associated with animal feces, soil samples, leaf litter and decaying fruit, as some cases on carcasses. In this study, we propose the extension of trophic niche of this species based on observations of alternative scavenging resources. Individuals were collected from the carcasses of domestic pigs in southern Brazil. We collected 126 individuals, which represented 68 % of beetles collected during the total decomposition period (14 days). The observed abundance was higher in the decay stage and thus, given this preference, this species may be useful for estimating the maximum postmortem interval, based on the chronology of species arrival at the resource. © 2016, Sociedad Venezolana de Entomología.31 4853