Rodents in Australia

Rats and mice are mammals.

There are three rodents which we encounter in residential Australia.

The Norway Rat.  The Roof Rat.  The House Mouse.

They look for food and shelter in late autumn and winter, and this is when they generally come into our homes.

  • House Mouse

    (Mus musculus)
    House Mouse

    • The House Mouse is also known as the Field Mouse
    • They are yellow-brown in colour
    • The ones which live inside are often darker than the ones living outside. They are often a grey colour and lighter on their belly
    • Due to their small size they easily enter our homes
    • They don't need much water and feed on grains, fruit and various animal and human foods
    • They are mainly nocturnal
    • It weighs about 20 grams and lives for around 1 year
    • It has approximately 6-10 litters of about 5-6 young
    • It has large hairy ears and a pointed nose.
    • Its tail is about the same length as its body
    • Its droppings are about 3-4mm long
  • Norway Rat

    (Rattus norvegicus(
    Norway Rat

    • This is the largest of the three rodents
    • It tends to flourish in food handling facilities, sewers, garbage areas and farms.
    • Norway rats make burrows in the soil and have concealed escape holes
    • In colder weather they live inside buildings, making nests in roofs cavities and walls
    • They weigh about 450 grams
    • It has a blunt nose
    • Its tail is shorter then its body length
    • Its fur is course and usually brown in colour
    • It lives for around 1 year produces 5-6 litters of abut 8 young
    • Their droppings are around 18mm long
  • Roof Rat

    (Rattus rattus)
    Roof Rat

    • The roof rat is usually found in heavily populated areas
    • They usually nest indoors if they find security in vegetation
    • They nest in roof and wall cavities
    • They weigh about 250 grams
    • They have a pointed nose and large ears which have little hair
    • They are of uniform colour which is either, grey, brown or black, and may be white underneath
    • Their tail is longer than its body
    • It lives for around 1 year during which it has 4-5 litters of about 6 -8 young
    • Its droppings are approximately 12mm