Bite marks

ship rat other teeth sq

Close-up of underside of ship rat head, showing front incisor teeth.

Characteristic sign is pairs of incisor teeth marks or holes that are about 2 mm wide.

Photograph: By CHUCAO (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons