Fauna
Mammal

Black Rat

Rattus rattus

Also known as Roof Rat, Ship Rat, House Rat

Black rats are exceptionally agile climbers that excel at navigating upper canopy layers, attics, and ship rigging. Their omnivorous diet allows them to thrive alongside human settlements, where they build leafy nests high above ground level. Historically famous as vectors of disease, these adaptable rodents remain major ecological threats to island wildlife around the globe.

Agile ClimberNocturnalSynanthropic
Black Rat reference1 / 7
Davidvraju / CC0 · cc0
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyGrains, Seeds, Bird Eggs
Predators
  • Domestic Cat
  • Barn Owl
  • Snakes
ThreatsPest control efforts and competition from brown rats
HabitatsUrban areas, farmlands, coastal forests, structures, ships
Life span1–2 years in the wild
Classification
  1. OrderRodentia
  2. FamilyMuridae
  3. GenusRattus
  4. SpeciesRattus rattus
Range & activity
Native Introduced

Native range in olive; established introduced range in rust.

Safe observation
Interaction riskModerate
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is moderate
Can carry transmissible pathogens and bite when cornered; avoid handling wild individuals.
Why it is dangerous
Carries transmissible pathogens such as Leptospira and flea-borne bacterial infections, and can inflict painful defensive bites.
How to recognize a risky encounter
Recognizable by a slender body, large translucent ears, and a dark tail longer than the head and body combined.
What to do
Do not handle live or dead rodents directly; use proper safety gear or professional pest services.
Responsible observation
  • Pest Prevention: Store human and pet food in airtight containers and keep trash bins sealed tight.
  • Observation: Look for long tails extending beyond body length as they walk along overhead power lines.
  • Safe Distance: Never handle wild rats or attempt to pick up trapped individuals without thick gloves.
Related species
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Urban Dwellers

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