Fauna of Europe: Wildlife Diversity and Biogeographic Regions

The fauna of Europe is a mosaic of animal communities shaped by latitude, elevation, peninsulas, islands, mountain barriers, river basins, regional seas and a long history of human land use. Arctic foxes and seabirds occupy the continent’s northern edge, large herbivores and carnivores range through boreal and temperate forests, burrowing mammals and open-country birds inhabit steppe landscapes, while Mediterranean islands, mountain streams and isolated freshwater basins hold animals with very restricted ranges.

No single group of animals can represent European wildlife. Mammals may be the most visible part of the fauna, but much of the continent’s ecological activity depends on fish, amphibians, reptiles, insects, molluscs, crustaceans and other invertebrates. Their distribution often follows habitat boundaries more closely than political borders.

European Fauna Has More Than One Geographic Boundary

Europe, the European Union and the European biogeographic assessment area are not interchangeable. A continental wildlife account may include European Russia, Iceland, Svalbard, the British Isles, Mediterranean islands and Atlantic island groups. EU conservation reports cover the Member States and the species or habitats listed under particular laws. Pan-European maps may add Arctic and Anatolian zones or use separate layers for Russia, Georgia and neighbouring areas.

The European Environment Agency’s pan-European mapping separates land into regions such as Arctic, Alpine, Atlantic, Black Sea, Boreal, Continental, Macaronesian, Mediterranean, Pannonian and Steppic areas. These regions describe broad ecological conditions rather than animal ranges with hard edges.[a]

Within those regions, the European Nature Information System classifies habitats from tundra and forests to grasslands, inland waters, coastal habitats and marine seabeds. Habitat classes provide a more useful starting point for fauna than a map divided only by country.[b]

Why Animal Communities Change Across Europe

Latitude controls season length and winter survival

Northern Europe has long winters, short breeding seasons and strong seasonal changes in food supply. Animals living there may migrate, store fat, change coat colour, reduce activity or depend on pulses of summer insects and vegetation. Farther south, cold becomes less restrictive, but summer drought and heat can limit daytime activity and access to surface water.

Elevation creates compressed climate zones

A mountain can contain several fauna zones within a short horizontal distance. Valleys may support broadleaf forest animals, higher slopes may hold conifer-associated species, and terrain above the tree line may favour cold-adapted grazers, marmots, snow voles, ptarmigan and cliff-nesting birds. Separate mountain ranges can isolate populations even when the climates appear similar.

Peninsulas and islands preserve isolated lineages

The Iberian, Italian and Balkan peninsulas acted as refugial areas during cold phases of the Quaternary. Animals later expanded northward from these southern areas, while other populations remained separated by mountains, seas or unsuitable lowlands. On islands, isolation can produce endemic species, distinctive subspecies, reduced dispersal and very small ranges.

Rivers divide freshwater fauna differently from land fauna

A terrestrial mammal may cross several national borders and watersheds. A small freshwater fish may remain confined to one river system, spring complex or karstic basin. Drainage history, waterfalls, salinity barriers and connections formed during former geological periods can therefore create sharply different fish and aquatic invertebrate communities in neighbouring catchments.

The Main Biogeographic Settings of European Wildlife

Arctic and Subarctic Fauna Lives Around Seasonal Extremes

The European Arctic includes northern Fennoscandia, Svalbard and the far north of European Russia. Its terrestrial food webs are restricted by cold, snow cover and a short growing season. Reindeer (Rangifer tarandus), Arctic fox (Vulpes lagopus), rock ptarmigan (Lagopus muta) and lemmings are adapted to long winters and rapidly changing food conditions.

Summer changes the apparent abundance of wildlife. Migratory waders, geese, ducks and seabirds arrive to breed during the brief period of high insect production and open water. Cliffs and offshore islands may support dense nesting colonies even where the surrounding land has few resident vertebrate species.

The marine system is inseparable from Arctic land fauna. Polar bears (Ursus maritimus), seals and seabirds depend on marine prey and sea-ice or coastal conditions. Nutrients carried from sea to nesting cliffs can also affect terrestrial vegetation and invertebrate communities near colonies.

Boreal Forests Are Forest–Wetland Systems

Northern conifer forests are interspersed with peatlands, lakes, streams, burned areas and deciduous regeneration. Their fauna cannot be understood by treating the landscape as an unbroken block of mature conifers.

Moose (Alces alces) browse young trees and wetland vegetation. Brown bears (Ursus arctos), grey wolves (Canis lupus), Eurasian lynx (Lynx lynx) and wolverines (Gulo gulo) occupy parts of the northern forest region, although their local distributions differ. Western capercaillie (Tetrao urogallus) use forest structures that supply ground vegetation, shelter and display areas.

Dead wood supports a separate animal community

Standing dead trees, fallen trunks, loose bark and decaying wood provide feeding and breeding sites for beetles, flies, ants and other invertebrates. Woodpeckers excavate cavities that may later be used by owls, passerines, bats, insects and small mammals. Removing dead wood can therefore alter several connected animal groups rather than only the organisms living inside the timber.

Peatlands add open-water and wet-ground fauna

Bogs and fens support breeding waders, cranes, dragonflies, aquatic beetles and amphibians. Small pools may contain fauna absent from the surrounding forest. Drainage changes water levels, vegetation and prey availability, so an apparently wooded region can lose wetland animals without losing its tree cover.

Atlantic Europe Is Defined by Coasts, Estuaries and Mild Winters

Atlantic-facing Europe includes exposed coasts, drowned river valleys, mudflats, salt marshes, heathlands and wet grasslands. Mild winters allow some animals to remain active for longer periods, while estuaries receive migrants from inland rivers, offshore waters and distant breeding grounds.

Estuaries concentrate prey

Tidal mud and shallow water can support dense invertebrate communities used by sandpipers, plovers, ducks and other waterbirds. Estuaries also connect river and sea habitats used by Atlantic salmon (Salmo salar) and European eel (Anguilla anguilla). Barriers or degraded water quality far upstream can therefore affect fauna observed near the coast.

Sea cliffs function as vertical breeding habitat

Atlantic puffins (Fratercula arctica), northern gannets (Morus bassanus), auks, fulmars and other seabirds use cliffs, ledges, burrows and offshore islands. Grey seals (Halichoerus grypus) and harbour seals (Phoca vitulina) use selected shores, sandbanks or rocky sites for resting and breeding. These coastal animals remain dependent on conditions beyond the visible nesting or haul-out site, including prey availability and disturbance at sea.

Temperate Europe Is a Human-Shaped Habitat Mosaic

Much of central and western Europe consists of woodland fragments, managed forest, pasture, arable land, hedgerows, villages, reservoirs, drainage channels and transport corridors. The fauna of this region often depends on the arrangement of habitat features rather than one large area of untouched vegetation.

Wild boar (Sus scrofa), roe deer (Capreolus capreolus), red deer (Cervus elaphus), European badger (Meles meles) and red fox (Vulpes vulpes) can use mixed landscapes, though tolerance of roads, settlement and intensive farming varies by species and locality. Bats may roost in buildings or old trees while feeding over rivers, woodland edges and pasture.

Farmland structure matters as much as farmland area

A field bordered by hedges, ponds, grassy margins and mature trees offers different feeding and breeding conditions from a large uniform field. Open-ground birds may need short vegetation, while pollinators depend on flower continuity and nesting substrates. Amphibians may use a farm pond for breeding but require terrestrial shelter during the rest of the year.

Habitat can remain visible while losing ecological function. A woodland cut into small pieces by roads may retain trees but no longer provide safe movement for all forest animals. A river can retain water while dams prevent migratory fish from completing their life cycle.

Pannonian and Steppe Fauna Depends on Open Ground

The Pannonian Basin and the steppes of eastern and south-eastern Europe support animals adapted to open visibility, dry soils, sparse woody cover and seasonal extremes. Burrowing is common among small mammals because underground chambers offer shelter from predators and temperature changes.

The European ground squirrel (Spermophilus citellus), European hamster (Cricetus cricetus) and steppe polecat (Mustela eversmanii) represent different parts of this open-land community. Great bustards (Otis tarda), larks and birds of prey require suitable combinations of feeding areas, display grounds, nesting sites and low disturbance.

Grazing can maintain habitat structure

Open grassland fauna does not always benefit when grazing stops. Without grazing, mowing or natural disturbance, some sites become dominated by tall vegetation and shrubs. This can remove bare soil, short turf and mixed-height patches used by ground squirrels, grasshoppers, ground-nesting birds and hunting raptors. Excessive grazing can also damage nests, soil and plant cover, so the ecological effect depends on timing, intensity and site conditions.

Mountain Fauna Changes with Elevation and Isolation

The Alps, Pyrenees, Carpathians, Apennines, Dinaric Alps, Balkan ranges and Scandinavian Mountains do not form one continuous mountain habitat. Each system has a different geological history, climate, degree of isolation and connection to surrounding lowlands.

Alpine ibex (Capra ibex), Alpine chamois (Rupicapra rupicapra), Alpine marmot (Marmota marmota), bearded vulture (Gypaetus barbatus) and golden eagle (Aquila chrysaetos) are associated with mountain terrain, but they use different elevation bands and habitat structures.

Some mountain animals have much narrower distributions. The Pyrenean desman (Galemys pyrenaicus) depends on suitable flowing-water habitats in the Iberian Peninsula and Pyrenees. Mountain salamanders and cave invertebrates may be restricted to one range, karst system or set of catchments.

Upslope movement does not create unlimited refuge

Warmer conditions may shift suitable climate zones toward higher elevations. For animals already living close to summits, the amount of available ground can contract as lower boundaries move upward. Roads, ski infrastructure, reservoirs and separated mountain massifs can further limit movement between suitable areas.

Mediterranean Fauna Is Divided Among Peninsulas, Islands and Seasonal Waters

Mediterranean Europe contains dry scrub, evergreen and deciduous woodland, mountain forest, steppe-like plains, agricultural mosaics, caves, temporary ponds, rivers, islands and long coastlines. It should not be treated as one uniform warm habitat.

Reptiles are prominent because long warm seasons support extended activity, although many species avoid the hottest part of the day. Hermann’s tortoise (Testudo hermanni), the ocellated lizard (Timon lepidus) and numerous wall lizards occupy different parts of the region. Bats use caves, buildings, woodland and open feeding areas. Amphibians may depend on springs, streams or temporary pools that remain suitable only during part of the year.

The Iberian Peninsula holds distinct mammal relationships

The Iberian lynx (Lynx pardinus) and European rabbit (Oryctolagus cuniculus) illustrate how a predator’s distribution can be linked to the condition of a particular prey base and its habitat. The rabbit is native to the Iberian region and parts of nearby southern Europe, even though human introductions later spread it far beyond that natural range.

Temporary water can support permanent lineages

Seasonal ponds and intermittent streams may dry during summer but remain necessary breeding habitat for amphibians and aquatic invertebrates. Animals using these waters may survive the dry period as terrestrial adults, buried larvae, resistant eggs or dormant stages. Converting a temporary pond into a permanent ornamental water body can also change its fauna by introducing fish or altering its drying cycle.

Island isolation produces narrow ranges

Mediterranean and Atlantic islands support animals found nowhere else. Examples include the Corsican nuthatch (Sitta whiteheadi), Balearic shearwater (Puffinus mauretanicus), Madeira firecrest (Regulus madeirensis) and several island lineages of the lizard genus Gallotia. Restricted range does not automatically mean that every population is declining, but it leaves fewer alternative habitats when fire, development, disease or introduced predators affect an island.

Europe’s Rivers and Lakes Contain Highly Localised Fauna

Freshwater animals are often underrepresented in accounts of European wildlife even though rivers, springs, lakes, floodplains and karst waters contain many restricted species. A fish confined to one catchment may have a much smaller usable range than a land animal recorded across several countries.

The 2026 European assessment found that almost six in ten native freshwater fish species were either threatened or Near Threatened. It also identified particularly high risk in karst systems, springs and intermittent rivers, many of which occur in southern Europe.[c]

Migratory fishes require connected catchments

Atlantic salmon move between rivers and the sea. European eel move across marine and freshwater environments during their life cycle. Sturgeons may require access between marine feeding areas and river spawning habitat. A protected river section cannot support these movements when barriers remain elsewhere in the route.

Aquatic invertebrates record different habitat conditions

Crayfish, freshwater mussels, aquatic snails, caddisflies, mayflies, dragonflies and other invertebrates respond to flow, substrate, oxygen, pollution and channel structure. Some mussels also depend on fish hosts during part of their development, linking the condition of two animal groups.

The Seas Around Europe Form Separate Faunal Systems

European marine fauna occupies waters ranging from the cold Arctic Ocean to the enclosed and warm Mediterranean. Salinity, depth, temperature, oxygen, tidal range, seabed type and connection to the Atlantic create different animal communities. The European Environment Agency treats the Baltic Sea, North-East Atlantic, Mediterranean Sea and Black Sea as separate marine regions, with additional subregional divisions.[d]

Coastal nurseries connect land and sea

Lagoons, estuaries, seagrass beds, salt marshes and shallow bays provide feeding or juvenile habitat for fish and invertebrates. Their fauna may be affected by river pollution, dredging, coastal construction, altered sediment movement and marine heat.

Marine range does not follow national waters

Whales, dolphins, porpoises, turtles, seabirds and migratory fish may cross several jurisdictions. Protection at one breeding or feeding site cannot remove threats encountered along the rest of a migration route.

Bird Migration Makes European Fauna Seasonal

The animals present in a European wetland, forest or coast can change greatly during the year. Some birds breed in the Arctic or northern forests and winter in western or southern Europe. Others breed in Europe and migrate to Africa. A third group passes through European stopover sites without spending the full breeding or winter season there.

Migration places distant habitats in one biological system. A waterbird population may depend on northern breeding ground, central European staging wetlands and southern winter habitat. Damage at any one of these areas can affect numbers observed elsewhere.

Not all seasonal movement crosses continents

Mountain animals may move between high summer ground and lower winter habitat. Bats can shift between breeding roosts, feeding areas and hibernation sites. Amphibians migrate short distances between terrestrial shelter and breeding water. These movements may be small on a map but still cross roads, fences and developed land.

Invertebrates Carry Much of Europe’s Ecological Work

Invertebrates make up most animal diversity, yet broad wildlife accounts often reduce them to a short reference to insects. European animal communities depend on many distinct invertebrate roles.

The 2025 European assessments reported that at least 172 of 1,928 assessed wild bee species faced extinction risk. They also placed 65 of 442 assessed butterfly species in threatened categories. More than 20% of assessed species in some groups, including bumblebees and cellophane bees, were threatened.[e]

Endemic, Native, Migratory and Introduced Are Different Statuses

Occurrence evidence does not prove a complete range

Museum specimens, survey observations, acoustic detections, camera-trap records and citizen-science observations can document that an animal was reported at a place and time. Record density may also reflect where people searched, which taxa were easy to identify and whether historical collections have been digitised.

A mapped occurrence is evidence of a reported record, not a complete boundary around the animal’s distribution. A single old or unverified record is also insufficient to establish a current regional population.

Invasive Animals Follow Transport and Water Networks

Introduced animals reach Europe through shipping, aquaculture, ornamental trade, pet releases, stocking, bait movement and accidental transport. Rivers, canals, ports, reservoirs and connected urban areas can then assist further spread.

The pond slider (Trachemys scripta), signal crayfish (Pacifastacus leniusculus) and pumpkinseed (Lepomis gibbosus) were among the widely reported animals in the EU’s 2019–2024 reporting for invasive alien species of Union concern. That reporting covered 87 listed plant, animal and other species rather than every non-native organism in Europe. More than 300 rapid eradication actions were reported, with 60% described as fully, partly or temporarily successful.[g]

Decline and Recovery Occur at the Same Time

Europe contains populations that are shrinking, stable, expanding, recolonising or recovering after targeted action. These conditions can occur within the same species in different regions. A growing population in one country does not establish a favourable condition across the continent.

Large carnivore recovery is uneven

Brown bears, wolves and Eurasian lynx have returned to or expanded within parts of their former European range. The Iberian lynx (Lynx pardinus), Balkan lynx population and wolverine remain separate conservation cases with different ranges and pressures. Expansion can also increase contact with livestock, roads and settlements, making coexistence measures part of population management.[h]

Protected status is not the same as recovery

Legal protection can reduce direct killing or habitat damage, but population recovery also depends on breeding success, habitat quality, prey, movement routes, genetic exchange and mortality outside protected areas. The EU Habitats Directive covers more than one thousand listed animal and plant species and 230 habitat types, but its assessment categories apply to listed features within the EU rather than all European fauna.[i]

EU Assessments Show Broad Habitat and Species Problems

The European Environment Agency reports that 81% of protected habitat assessments, 39% of bird assessments and 62% of other protected species assessments were in poor or bad condition. These figures refer to species and habitats of community interest under EU reporting systems, not to every animal population in geographic Europe.[j]

Land and sea use, extraction of biological resources, pollution, invasive alien species and climate change often act together. The pressure combination differs by habitat: river barriers affect fish movement, drainage removes wetland breeding sites, uniform forestry reduces old-tree and deadwood habitat, and intensive land management can remove both feeding resources and movement cover.

Protected Sites Need Functional Connections

A protected site can retain breeding habitat while remaining isolated from feeding grounds, seasonal refuges or neighbouring populations. Animal movement may depend on river continuity, hedgerows, forest belts, stepping-stone wetlands, road crossings, unlit corridors or undisturbed coastal sections.

Restoration Must Match the Animal’s Full Habitat Cycle

Restoring vegetation alone may not recover fauna when water flow, soil condition, prey, nesting substrate or migration access remains unsuitable. A river project must consider upstream and downstream movement. A meadow project must provide flowers across the activity season as well as nesting ground. A forest project may need old trees, cavities, dead wood, canopy gaps and links to nearby stands.

Regulation (EU) 2024/1991 has applied since 18 August 2024. It sets an EU target for restoration measures to cover at least 20% of land and at least 20% of sea areas by 2030, followed by all ecosystems needing restoration by 2050. Member States are expected to submit national restoration plans in September 2026.[l]

The future composition of European fauna will depend on more than the area labelled as protected. Habitat quality, river continuity, seasonal movement, genetic exchange, water availability, disturbance and the arrangement of land and sea uses determine whether animal populations can feed, breed and move across their full life cycle.

Sources and Verification

1. [a] European Environment Agency — Biogeographical regions in Europe — Used for the pan-European biogeographic region names and the distinction between ecological regions and political borders.
2. [b] European Nature Information System — About EUNIS — Used for the scope of the pan-European habitat classification across terrestrial, freshwater, marine, natural and artificial habitats.
3. [c] IUCN — Almost half of European freshwater fishes at risk of extinction — Used for the 2026 assessment scope, threatened and Near Threatened shares, habitat findings, migration trends and reported pressure percentages.
4. [d] European Environment Agency — Regional seas surrounding Europe — Used for the separation of Europe’s surrounding waters into distinct marine regions.
5. [e] IUCN — Mounting risks threaten survival of wild European pollinators — Used for the 2025 wild bee and butterfly assessment totals and threatened-species shares.
6. [f] IUCN — European Biodiversity Conservation — Used for the stated coverage of 15,060 European Red List assessments and the taxonomic groups represented.
7. [g] European Environment Agency — EU makes progress against invasive alien species, but spread continues — Used for 2019–2024 reporting coverage, widely reported invasive animals and rapid eradication results.
8. [h] Council of Europe, Bern Convention — Conservation of Large Carnivores — Used for the differing recovery and threat conditions among wolves, bears, Eurasian lynx, Iberian lynx, Balkan lynx and wolverines.
9. [i] European Commission — Habitats Directive — Used for the legal assessment scope covering more than one thousand listed species and 230 habitat types.
10. [j] European Environment Agency — State of Europe’s biodiversity — Used for the reported condition of protected habitats, birds and other protected species and for the principal pressure groups.
11. [k] European Environment Agency — Conservation status of protected habitats and species — Used for the exact Good, Unknown, Poor and Bad percentages presented in the chart.
12. [l] EUR-Lex — Regulation (EU) 2024/1991 on nature restoration — Used for the application date and the EU restoration targets for 2030 and 2050.