Rat Species

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Common Rat Species

Common rat species in the UK. In the United Kingdom, residents and business owners often encounter challenges with rat infestations, primarily involving two distinct species. The first, known as the Brown Rat (Rattus norvegicus), also widely referred to as the common rat, is prevalent across numerous environments, from urban dwellings to rural settings. The second species, the Black Rat (Rattus rattus), though less common, poses significant concerns due to its adaptability and the various health risks it carries. Both species are adept at thriving in close proximity to human habitats, making them a notable concern for property owners seeking to maintain safe and healthy environments.

Eradix Expert Rat Control Services

Noticing the presence of rats can often be the tip of the iceberg, signaling a deeper infestation issue within your premises. Understanding the critical nature of such situations, Eradix is at your service to address and resolve rat problems with efficiency and expertise. Should you observe any signes of rat activity, we urge you to contact us immediately at 0800 211 8868. Our team is dedicated to providing swift, effective solutions to ensure your environment is safe and rat-free, leveraging the latest in pest control technologies and methodologies.

Black Rat (Rattus rattus)

Predominantly found in port areas, Black Rats are a rarer sight across the UK, marking a specific interest more than a common threat.


  • Size: Length ranges from 16 to 24 cm, with a notably long tail that exceeds the combined length of its head and body.
  • Weight: Typically reaches a weight of between 150 to 200 grams.
  • Appearance: Recognizable by their pointed nose, large ears, and more slender build compared to their counterpart, the Brown Rat (Rattus norvegicus).

Lifecycle and Behavioral Patterns:

  • Reproduction: Capable of producing between 5 to 10 offspring per litter, with 3 to 6 litters annually.
  • Gestation: The gestation period spans approximately 3 weeks.
  • Maturity: Attains sexual maturity between 12 to 16 weeks post-birth.


  • Agility: Black Rats are proficient climbers, utilizing their agility in navigating environments.
  • Burrowing: Unlike their counterparts, they are less inclined to burrow and are seldom found in outdoor settings within the UK.
  • Diet: Shows a preference for moist fruits, consuming around 15g of food and 15ml of water daily.

Brown Rat

The Brown Rat, also known as the common rat, is widely encountered across various environments in the UK, from urban areas like London to the countryside.


  • Size: Typically measures between 20 to 25 cm in length, not including the tail.
  • Weight: Adults can weigh between 350 to 500 grams.
  • Physical Attributes: Noted for its robust body, blunt nose, small ears, and a tail shorter than its body length.

Life Cycle

  • Reproduction: Exhibits a high reproductive rate, with 5 to 12 offspring per litter and up to 5 litters per year.


  • Gestation: Carries a gestation period of about 21 to 24 days.


  • Growth to Maturity: Young Brown Rats reach sexual maturity at about 5 weeks of age.


  • Versatility: Known for their adaptability, Brown Rats can thrive in a wide range of environments and are often found near human settlements.
  • Burrowing: They are proficient burrowers, often creating complex networks of tunnels, especially in outdoor areas.
  • Diet: Primarily omnivorous, Brown Rats have a varied diet but prefer cereals, consuming approximately 30g of food and 60ml of water per day.

Contact Us


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A conversation about your pest concerns will be initiated, followed by an arranged evaluation if needed. We’ll offer a quotation and suggestions based on the findings.


Our BPCA certified expert will visit your property to conduct pest control treatments.


We are committed to ensuring your issue is fully resolved, with as many visits as necessary.