Profile of a House Mouse:

The most common rodent invader is the house mouse. We consider them a parasite of human dwelling as they love the refuge, shelter and food that they discover in our homes.

Mice are a nuisance, at the least and can pose significant health risks and damage to residential structures.

These rodents breed often and are smart mammals. A house mouse litter can be as large as 6 and as often as 3 weeks.

So, if these rodents find their way to our pantry, they can multiply quickly and become more than just a nuisance.

If you come across a situation where you are not sure if the droppings or damage is caused by mice or rats, we point out a few key points that help you determine if you are dealing with mice or rats.

Other times, clients are not even sure if they are dealing with rodents or something else. They may hear noises behind drywall or observe some other disturbance such as pile of saw dust or sand, etc. We list a few tell tale signs that indicate that you may be dealing with a mice or a rat issue. This PestWorld article also describes house mouse traits in good details.


  • Color: Brown to Grey with a lighter underside.
  • Ears: Large
  • Eyes: Small
  • Tail: Slightly less than body length
  • Weight: An adult weighs between 10 – 25 grams.
  • Litters: It produces 5 – 8 litters per year.
  • Litter Size: Each litter size is between 4 – 8.
  • Maturity: It takes 6 – 8 weeks.
  • Life Span: They live between 12 to 24 months.

House Mouse


This is a house mouse caught in a glue trap in a garage in Ajax, Halton Region.

Mice like to Nest in the insulation behind our drywalls.

Rodenticides are deployed in Tamper Resistant Lockable Bait Stations.

Mice and Rats feeding on the Bait.