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.

Black with silver-white stripes, 5–10 mm. Invasive species from Southeast Asia, arrived in Europe in 1979. Now established in 13 EU countries; with climate warming spreading north every year.

Vector for dengue, chikungunya, Zika, West Nile, and yellow fever. France logged 228 locally-acquired chikungunya cases in summer 2025 alone — 7x previous 14-year total. Aggressive day-biter, unlike most other mosquitoes.

Established in Italy, France, Spain, Portugal, Greece, Croatia, Albania, Bulgaria, Romania, Slovenia, Switzerland, southern Germany, Hungary. Spreading to Belgium, Netherlands, UK.

Bites by day (dawn and dusk peaks). Breeds in tiny pools of water — flowerpots, gutters, bottle caps. One female lays 100+ eggs per cycle.

Brown mosquito 5–7 mm — the typical 'house mosquito' across Europe. Native, not invasive — but increasingly dangerous as warming climate amplifies disease cycles.

Primary vector of West Nile virus in Europe. Italy alone logged 430 WNV cases and 27 deaths in summer 2025 — equal to all US cases for that year. Spain, Greece, France, Romania, Hungary all reporting outbreaks.

All of Europe except the far Arctic. Breeds in any standing water — gutters, water butts, flooded basements, urban drains.

Bites mostly at dusk and night. Females hibernate in basements/attics through winter. The lifecycle from egg to adult takes only 7–10 days in summer.

Common throughout Europe. Males reach 200 kg with razor-sharp tusks. Adapts well to humans — boars now roam parks of Berlin, Rome, and Barcelona; 3,000+ in Berlin alone.

Causes more wild-animal injuries in Europe than any predator. A sow defending piglets or a wounded male can disembowel within seconds.

Forests, fields, and increasingly suburban areas of major cities.

Lives in family groups (sounders). Active at dusk and night. Charges with tusks aimed at the legs and groin — capable of 40 km/h.

Grey or brown with a distinctive zigzag along the back, up to 80 cm. The northernmost venomous snake in the world — found inside the Arctic Circle in Lapland.

Hemotoxin causes pain and swelling. Around 0.5% of bites are fatal — usually only in children, the elderly, or those with allergies. About 7,500 bites per year across Europe.

Forests, bogs, heathland, and mountain meadows up to 3,000 m elevation.

Shy and retreating. Bites only when stepped on or cornered. Active by day in cool weather, by night in summer.

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.

Smaller and darker than European hornet, with yellow legs. Invaded Europe via France in 2004 and now spread across France, Spain, Portugal, Italy, UK, Germany, Belgium.

Highly aggressive when nests are disturbed. Several confirmed deaths in France and Spain from anaphylactic shock. Devastating to honey bee colonies — kills up to 50 bees per day per hornet.

Builds large nests high in trees — often only spotted in autumn when leaves fall.

Hovers in front of beehives picking off returning bees. Defends its nest aggressively at 5 m distance — silent, fast, persistent.

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.

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.

European wolf, smaller than its Russian or American cousins. Returning to Western Europe after centuries of absence — first wolves in Belgium since 1900 arrived in 2018.

Healthy wolves almost never attack humans — only 0–2 fatal attacks per decade in Europe. The real risk is rabid individuals; rabies is now mostly eliminated in Western Europe.

Forests and mountains of Eastern Europe, Scandinavia, the Balkans, and increasingly Germany, France, Belgium, and the Alps.

Hunts in packs. Highly intelligent and avoids humans. Communicates by howling over distances of 10 km.

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.

Large (up to 25 mm) robust fly with iridescent eyes. Females need blood for eggs — slice skin with bladed mouthparts rather than piercing.

Bite is significantly more painful than mosquito — feels like a needle. Can transmit anthrax, tularemia, Lyme disease, and EIA. Allergic reactions cause anaphylaxis in rare cases.

Forests, pastures, near water across all of Europe — most common in Russia, Ukraine, Belarus, Poland, Scandinavia, Germany, France.

Active in hot, sunny weather. Attracted to dark-colored, moving objects. Persistent — keeps following until it bites.