There are four species of large fruit-eating bats, called flying foxes, twenty of insect-eating bats, above twenty of land-rats, and five of water-rats.
It is true indeed that in zoological nomenclature some of these are distinguished as "voles," but this is not in accord with popular usage, where such creatures - come under the designation either of water-rats or field-mice.
Mice, rats, water-rats and moles, as well as frogs, constitute its principal food.
2 (total 12) in the Australian water-rats; but in the great majority of species it presents striking uniformity, and may be set down typically as i.
In the typical Australian and Papuan Hydromys, locally known as water-rats, the molars originally have transverse ridges, the enamel folds between which form cutting edges whose sharpness depends upon the degree to which the teeth have been worn, while the large hind feet are webbed.