Small, dark tick — the primary disease vector in Europe. Despite being only 3–4 mm, kills more Europeans annually than any other animal.

Transmits Lyme borreliosis (200,000+ cases/year), tick-borne encephalitis (3,500+ cases/year, ~30 deaths), babesiosis, anaplasmosis. The TBE vaccine exists.

Forests, parks, tall grass, urban green spaces. Most active April–June and September–October.

Quests on grass tips and twigs, latching on contact. Seeks warm, moist body sites. Feeds for 3–7 days before dropping off.

Familiar farm animal, but in the UK cows kill more people each year than any other animal — 4-7 deaths annually. Often when walkers cross fields with calves.

Cows with calves are extremely protective. Bulls in fields with public rights-of-way are a known UK hazard. Most attacks involve dog-walkers — cows perceive dogs as a threat.

Fields and pastures across all of Europe. Particularly relevant in UK, Ireland, France, Germany where rights-of-way cross farmland.

Normally docile but unpredictable. Charges with horns lowered. UK Health & Safety advises: release dogs immediately if approached.

Up to 3.5 cm — Europe's largest social wasp. Yellow-brown with reddish-brown markings. Builds papery nests in tree hollows and attics.

A single sting is painful but rarely lethal. Multiple stings or anaphylactic shock can kill — about 30 deaths per year across Europe from wasp/hornet stings combined.

Forests, gardens, villages, and city parks across most of Europe except the far north.

Active by day. Hunts other insects — a colony eats 500 g of insects daily. Defends the nest collectively when disturbed within 5 m.

Not a true jellyfish but a colony of organisms. Distinctive blue-purple gas-filled float with 30-metre tentacles trailing below.

Excruciatingly painful sting causing whip-like welts. Rarely lethal, but several deaths recorded from heart failure or drowning after shock.

Atlantic Ocean — frequently washed onto beaches of Portugal, Spain, Britain, Ireland, especially after autumn storms.

Drifts on the wind with its sail-like float. Cannot swim — entirely passive. Tentacles sting for weeks after death on a beach.

Small sandy-brown fish — up to 15 cm — that buries itself in shallow sand with only its eyes and dorsal spine showing. Found at swimming depth.

Stepping on it drives a venomous spine into the foot, causing severe pain for 2–24 hours. Rarely fatal but ER visits common — UK alone reports 1,000+ stings per year.

Sandy shallows of the Atlantic and Mediterranean coasts of France, UK, Ireland, Spain, Portugal, Italy.

Buries in sand at low tide. Strikes only defensively. Most stings occur on popular beaches in summer at low water.

Most widespread carnivore in Europe. Adapts to cities — urban foxes are common in London, Berlin, Warsaw. Population in UK estimated at 357,000.

Direct attacks on adults are rare. The real danger is rabies (eastern Europe) and Echinococcus multilocularis — a tapeworm in fox feces that can kill humans if eggs are ingested.

Forests, fields, suburbs, and city centres across all of Europe.

Crepuscular and nocturnal. Solitary or family groups. Bold around humans where not hunted.

Yellow-green spider, body up to 1.5 cm. Builds silk sacs in tall grass and grain fields. Spreading north with climate change.

Most painful bite of any European spider — described as a wasp sting. Causes nausea, swelling, occasionally fever lasting 24 hours. Not lethal in healthy adults.

Tall grass, grain fields, vineyards, and dry meadows of Central and Southern Europe.

Active at night. Females aggressively defend egg sacs in summer — most bites occur during harvest or grass-cutting.

Largest European deer — stags up to 240 kg with massive antlers. Found from Scotland to the Carpathians.

Hundreds of vehicle collisions yearly across Europe. Stags during the September–October rut occasionally attack humans, dogs, even cars — antlers are deadly.

Forests, moors, and parklands across Europe.

Lives in single-sex herds outside the rut. Stags roar to attract hinds; the sound carries for kilometres.

World's largest jellyfish — bell up to 2 m wide, tentacles up to 30 m long. Russet-brown 'mane' of dense tentacles. Drifts on Atlantic currents to Britain and Ireland.

Sting causes severe burning pain, blistering, and in rare cases anaphylaxis or heart problems. Beach closures in Ireland, UK, and Norway each summer.

Cold waters of the North Atlantic — Norway, Iceland, UK, Ireland, Baltic. Drifts south in late summer.

Slow drifter — moved by currents and tides. Can sting through thin clothing. Even detached tentacles remain dangerous.

Up to 1.5 m and 25 kg. Apex predator of European freshwater. Sharp backwards-pointing teeth give terrible wounds.

No deaths recorded but documented attacks on swimmers — bites legs and arms, mistaking them for prey. Wounds are deep and require stitches.

Lakes and slow rivers across all of Europe except Iberia and the far south. Common in Scandinavia, Baltics, Russia, Belarus, Poland, Germany.

Ambush predator — lurks among reeds. Strikes with explosive speed. Eats ducklings, water rats, and even small dogs.