Leptodactylus furnarius
Its natural habitats are moist savanna , subtropical or tropical moist shrubland , subtropical or tropical high-altitude shrubland , subtropical or tropical seasonally wet or flooded lowland grassland , freshwater marshes , intermittent freshwater marshes , pastureland , plantations , rural gardens , and ponds . 
<triplet> savanna <subj> grassland <obj> subclass of <triplet> grassland <subj> habitat <obj> instance of