crawl rat is used on brittle
spiny_rat is rodent. packrat is wood_rat. dusky_footed_wood_rat is wood_rat. wood_rat is not rodent. sand_rat is rodent. dusky_footed_wood_rat is not wood_rat. kangaroo_rat is pocket_rat. cane_rat is rodent. wood_rat is rodent. pack_rat is mammal.