Heavy-bodied viper up to 95 cm with a distinctive horn on the snout. Considered the most dangerous snake in Europe — venom is more potent than other European species.

Causes severe local damage, hemorrhage, and occasionally death. Without antivenom, mortality reaches 5–15%. About 50 bites per year reported in the Balkans.

Dry rocky slopes, vineyards, scrubland, and ruins in the Balkans, Alps, and southeastern Europe.

Slow and reluctant to flee. Holds ground and strikes repeatedly when threatened. Active in spring and autumn — hibernates from October to April.

Largest land predator in Europe. Males reach 350 kg. Mostly omnivorous; can outrun a horse over short distances and is an excellent swimmer and tree-climber when young.

Attacks rare but documented — about 10 fatal attacks per decade across Europe. Most occur when surprising a sow with cubs or a wounded individual.

Mountain forests of the Carpathians, Scandinavia, Balkans, Pyrenees, Alps, and Russian taiga.

Hibernates Nov–Mar in dens. Active at dawn and dusk. A sow defending cubs is the most dangerous scenario.

Glossy black with 13 red spots on the back — hence its Italian name, malmignatte. Smaller than American black widow but with similar venom.

Alpha-latrotoxin causes severe muscle spasms, abdominal cramping, hypertension, and sweating ('latrodectism'). Antivenom available; before its development, mortality was 4–5%.

Dry steppes, vineyards, abandoned buildings, and stone piles across southern Europe and the Balkans.

Builds tangled webs near the ground. Female bites only when pressed against skin — typically when moving rocks or harvesting grapes.

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.

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.

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.

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.

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.