Histomoniasis, is a significant disease of gallinaceous birds. Transmission is dependent on the nematode Heterakis gallinarum. Due to the role that H. gallinarum plays in the maintenance of H. meleagridis, it is important to define the host-range distribution. From 2015-2017, ceca were collected from game birds in Pennsylvania. Cecal contents were examined and all Heterakis spp.  were identified by morphology. All nematodes were identified as H. gallinarum, except the ruffed grouse, which harbored H. isolonche.