title: Helminth parasites of the black-billed magpie, Pica pica hudsonia (Sabine, 1823), from Southwestern Montana.
mesh_terms: D000375:Aging; D000818:Animals; D001715:Bird Diseases / Q000453:epidemiology*; D002589:Cestoda / Q000302:isolation & purification; D004449:Echinostoma / Q000302:isolation & purification; D006374:Helminthiasis, Animal; D009009:Montana; D009348:Nematoda / Q000302:isolation & purification; D012621:Seasons