House Mouse

Mus musculus

  1. Wildlife
  2. Mammals
  3. House Mouse


As their name suggests, the House Mouse thrives wherever there are people, particularly in farm buildings, warehouses, sheds and garages, although it is no longer a common resident of our houses. The House Mouse is the ancestor of our domestic mice and can be a serious pest of grain stores.

How to identify

Much smaller than a rat, the House Mouse can be distinguished from the Wood Mouse by its grey-brown colour, relatively smaller ears and eyes.

Where to find it

Found throughout the country. In decline largely due to modern housing not providing suitable living space and use of poisons.


When to find it

  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December

How can people help

House Mice can be a serious pest, but mostly will live side-by-side with humans without cause for concern. They have extremely good homing instincts, so if you catch and release one, do so at least a mile from where you found it to ensure it does not return. The Wildlife Trusts work with pest controllers to find the most wildlife-friendly solutions to some of our everyday problems.

Species information

Common name
House Mouse
Latin name
Mus musculus
Length: 8cm plus a tail of 7cm Weight: 20g Average lifespan: 1 year
Conservation status