Pest Guides

House Mouse

Mus domesticus


Image of a House Mouse (mus domesticus) | Rentokil Pest Control Fiji
  • 7 – 9.5cm in length, with a tail around the same length.
  • 12 – 30g in weight.
  • Their relatively small feet & head and large eyes & ears distinguish them from a young brown rat (Rattus norvegicus).


  • 4 – 16 young per litter; 7 – 8 litters a year.
  • Gestation period of about 3 weeks.
  • 8 – 12 weeks from birth to sexual maturity.


  • Usually ground living and burrowing, but often climbs.
  • Preferred food is cereals.
  • Will eat around 3g of food a day and can survive without any additional water. They will drink up to 3ml a day if their diet is particularly dry.