sentence: its natural habitat are subtropical or tropical moist lowland forest , dry savanna , moist savanna , subtropical or tropical dry shrubland , subtropical or tropical moist shrubland , subtropical or tropical dry lowland grassland , subtropical or tropical seasonally wet or flooded lowland grassland , subtropical or tropical high-altitude grassland , river , intermittent rivers , swamp , freshwater lake , intermittent freshwater lakes , freshwater marsh , intermittent freshwater marshes , freshwater spring , arable land , pastureland , rural gardens , urban area , heavily degraded former forests , water storage areas , pond , open excavations , and canal and ditches .