Fauna
Mammal

Eurasian Otter

Lutra lutra

Also known as European Otter, Eurasian River Otter, Common Otter, Old World Otter

Eurasian otters are master navigators of freshwater rivers, lakes, and coastal shorelines, using sensitive whiskers to detect fish movements in murky water. Solitary and strongly territorial, adults mark their home ranges with distinctive tar-like droppings called spraint that scent-mark prominent rocks and bridge supports. Dens known as holts are carved among tree roots or rocky crevices, providing secure nurseries for young cubs born throughout the year.

SemiaquaticTerritorialCarnivore
Eurasian Otter reference1 / 7
Bernard Landgraf / CC BY-SA 3.0 · cc-by-sa
—observations
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Near ThreatenedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNear ThreatenedRed List categories, explained →
Key facts
Diet & preyFish, Amphibians, Crayfish
Predators
  • Wolves
  • Eagles
  • Domestic Dogs
ThreatsWater pollution, habitat destruction, road traffic strikes
HabitatsRivers, streams, lakes, coastal marine waters, marshes
Life span8–12 years in the wild
Classification
  1. OrderCarnivora
  2. FamilyMustelidae
  3. GenusLutra
  4. SpeciesLutra lutra
Range & activity
Native
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Wild otters can deliver a powerful bite if cornered; keep a respectful distance along waterways.
Why it is dangerous
Strong crushing jaws and sharp teeth designed for catching fish can inflict deep puncture wounds.
How to recognize a risky encounter
Sleek brown coat with a pale throat, webbed feet, and a thick tapered tail low in the water.
What to do
Never corner or approach a wild otter on a riverbank or near its den.
What to notice
Recognized by low swimming profile, five-toed muddy tracks, and tarry spraint on rocks.
Support conservation
Maintain a respectful distance from holt sites under roots or riverbanks to avoid disturbance.
Responsible observation
  • Look for spraint: Search riverbank rocks and bridge footings for sweet-smelling, fishy droppings.
  • Watch dawn and dusk: Scan quiet river stretches early in the morning for low-profile swimming.
  • Keep dogs leashed: Protect both pets and otters along active riverbank corridors.
Related species
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