Species of mice in the UK

There are five native species of mice living in the UK and a sixth non-indigenous species - the edible dormouse - which was introduced to our shores from Hungary in 1902 and was once a snack food delicacy! I think I’ll stick to salt and vinegar crisps.

Out of the five main species of Mice indigenous to the UK, only three are considered pests as they can pose a threat to homes and businesses - the House Mouse, Field Mouse and Yellow Necked Field Mouse.

The House Mouse (Mus musculus)

The common House Mouse is the main species to be considered as a pest, as it chooses to use our homes and places of work in which to reside. During an infestation of our home or place of work, Mice will cause damage to our properties and leave behind evidence of their unwelcome existence including droppings, urine, strong pungent odours and filthy smear marks.

House Mice are classified as a serious public health pest as they are known to carry a number of diseases that are infectious to man. Mice also contaminate food supplies. 


House Mice are active all year round and as such, you home or place of business are at risk of infestation throughout the year.

Characteristics and behaviour

  • Large round ears
  • Small feet
  • Brown- grey in colour
  • Strong smelling
  • Pointed Snout
  • Long almost hairless tail
  • An adult mouse will have a total body length of between 7.5cm-10cm and a tail matching the same length as the body
  • Weight 11-25g
  • Mice are omnivores and are happy to eat just about anything plant or meat based and can obtain all the moisture they require to survive from the food they eat
  • A mouse consumes only small amounts at a time and requires 3-5g per day to survive
  • Main feeding times for the House Mouse are at dawn and dusk
  • House Mice are usually found living indoors
  • Mice are excellent climbers

Lifecycle of Mice

  • Mice reach maturity in approximately 4 weeks
  • Gestation period 19-21 days
  • Litter size 5-14
  • Number of litter per year 5-10
  • Life expectancy up to 2 years, but the average life expectancy for a mouse is 5-6 months

The Field Mouse (Apodemus sylvaticus)

The Field Mouse, also known as the Wood Mouse, is the most common and widespread Mouse in the UK and will rarely venture into properties inhabited by humans during the winter months.

They will enter into outbuildings and sheds where food sources such as stored fruit, vegetables and agricultural seeds are kept and are therefore considered a threat to both home stored products, but more importantly a threat to businesses, especially agriculture facilities.

Characteristics and behaviour

  • Sandy brown fur with the under belly being white to grey
  • Unlike the House Mouse, the Field Mouse has large back feet which allows them excellent leaping skills
  • Field Mice are cautious and always use their heightened sense of smell, sniffing anything before approaching
  • Field Mice do not emit a strong odour
  • An adult mouse will have a total body length of between 8cm-10cm and a tail length of 7cm- 9cm
  • Weight 11-25g
  • In the Wild, the Field Mouse’s diet is predominantly seeds from trees and occasionally fruit, berries, nuts and even mushrooms. But as with most Rodents, they are omnivores and will also eat Snails and insects
  • The Field Mouse is Nocturnal meaning it is active during the hours of darkness. During the day, Field Mice live in burrows underground

Lifecycle of Mice

  • Mice reach maturity in approximately 4 weeks
  • Gestation period approximately 24 days
  • Litter size 2-9
  • Number of litter per year 5-10
  • Life expectancy up to 2 years, but the average life expectancy for Field Mice is approximately 2-3 months

Why should you choose Country Life Pest Control?

Fast and Friendly Service

Family-owned business with over 30 years customer service experience. You are guaranteed a friendly reassuring voice over the phone and excellent customer service, offering same-day call out or within 24 hours.

Fully Qualified and Insured

We are fully qualified to industry standard RSPH Level 2, Members of the NPTA and Members of the Professional Pest Controllers Register, so you are in safe hands.


Environmentally Sensitive

After an initial site survey, we will recommend the best treatment to solve your pest infestation. In all cases, all treatments are in line with current codes of practice and are both child and pet-friendly.

Free no-obligation quotes

In most cases, we are able to offer free quotations for control of pests over the phone and guarantee no call out charge on completed work.

Your Local Pest Exterminators

07496 750071