Ship rat footprints.
Ship rat footprints are probably the most frequently found rat prints in tracking tunnels, as they are the most widespread rat species in New Zealand. However, it is difficult to tell rat prints apart because of the overlapping size range of juveniles and adults of different species. Ship rat forefeet have four toes widely spaced in a circular pattern around up to three central pads and the adult print will be about 13.1 mm wide and 11.9 mm long. The adult hindfeet are about 17.7 mm wide by 16.5 mm long, with the middle three toes in front of the main pads (up to five) and the outer toes on either side of the main pads.
Drawing: by Sonia Frimmel