The Black Forest in southwestern Germany supports a surprisingly rich community of wildlife, from roe deer and European wildcats to capercaillie, fire salamanders, and a giant earthworm found nowhere else on the planet. Despite centuries of logging, settlement, and tourism, the region’s mix of dense coniferous forest, montane meadows, bogs, and cold streams still provides habitat for dozens of mammal, bird, amphibian, and invertebrate species. Some are thriving, some are declining fast, and a few newcomers have shown up uninvited.
Roe Deer, Chamois, and Wild Boar
Roe deer are the most visible large herbivores in the Black Forest. They browse heavily on young trees, especially in areas where bark beetle outbreaks or storms have opened up the canopy. Research on roe deer browsing at forest disturbance sites found that open, post-calamity areas receive more browsing pressure than intact forest, particularly near forest edges. Interestingly, when attractive wild forage plants grow nearby, individual tree seedlings get less attention from deer, because the animals spread their feeding across a wider menu. Where grasses and other unpalatable plants dominate instead, roe deer concentrate on whatever woody seedlings they can find.1Forest Ecology and Management. Herbivory after calamity – Patterns and drivers of roe deer browsing on bark beetle induced disturbance sites
Chamois, more commonly associated with the Alps, also inhabit steep, rocky terrain in the Black Forest’s higher elevations. Their populations can reach high densities and cause significant damage to regenerating trees, making them a persistent headache for forest managers.2ScienceDirect. Wildlife habitat analysis – a multidimensional habitat management model Wild boar round out the ungulate picture. They are widespread across most of Germany’s forested landscapes, rooting through the leaf litter for bulbs, insects, and fungi. In the Black Forest, their numbers fluctuate with mast years, when beech and oak trees produce heavy crops of nuts.
The European Wildcat and Other Secretive Mammals
One of the Black Forest’s more elusive residents is the European wildcat. These cats look superficially like large tabby housecats but are a distinct species, stockier and bushier-tailed. Genetic research on wildcats in the upper Rhine region found substantial gene flow among sampling sites, with positive spatial autocorrelation extending up to about 10 kilometers for males and 5 kilometers for females. Even the Rhine River itself did not act as a strong barrier to wildcat movement, which contradicted earlier assumptions. Still, many wildcats persist in isolated, patchy forest fragments, and maintaining connectivity between these pockets is considered essential for the long-term viability of the population.3Conservation Genetics. Crossing the Rhine: a potential barrier to wildcat (Felis silvestris silvestris) movement?
Beyond wildcats, the Black Forest shelters red foxes, European badgers, and pine martens. Pine martens are agile, tree-climbing predators that den in old woodpecker cavities and hollow trunks. Their presence depends on mature forest with enough structural complexity to provide nesting sites and hunting routes through the canopy. Several species of bat also rely on the forest’s older trees. A study of tree-related microhabitats and their link to forest organisms found that rot holes in trees were directly associated with bats of the Pipistrellus group, the small bats commonly seen hunting insects at dusk. For these bats, the abundance of cavities in aging trees mattered more than most other environmental variables.4PubMed. What do tree-related microhabitats tell us about the abundance of forest-dwelling bats, birds, and insects?
Small mammals like bank voles, yellow-necked mice, and dormice are less glamorous but ecologically critical. They shape the forest from the ground up by dispersing fungal spores. Research has shown that small mammals carry a fundamentally different set of fungi than wind does: mammal scat is loaded with mycorrhizal fungi and soil saprotrophs, while wind spreads wood-decay fungi, litter decomposers, and plant pathogens. The spores mammals carry also tend to be larger. This means squirrels, voles, and mice effectively act as the forest’s underground gardening crew, inoculating the soil with the symbiotic fungi that tree roots depend on for nutrient uptake.5PubMed. Wind and small mammals are complementary fungal dispersers Generalist rodents play an underappreciated role in this process: during years when species like chipmunks and deer mice reach high numbers, their contribution to spore dispersal can approach or even surpass that of fungal specialists, particularly in forest types where specialist rodents are less common.6PubMed. The underappreciated role of rodent generalists in fungal spore dispersal networks
Capercaillie and Mountain Forest Birds
The capercaillie, Europe’s largest grouse, is a flagship species of the Black Forest and one of its most troubled. Males can weigh over four kilograms and perform elaborate spring courtship displays in forest clearings. But capercaillie need a very specific mosaic of old coniferous forest with a rich understory of bilberry shrubs, open gaps for display, and relatively little human disturbance. A wildlife habitat model that used capercaillie as a case study noted that the species has suffered substantial habitat loss, resulting in population decline.2ScienceDirect. Wildlife habitat analysis – a multidimensional habitat management model
Climate modeling has made the outlook grimmer. A study examining how climate change affects montane forest birds found that capercaillie in the Black Forest face a roughly 27% reduction in the probability of occurrence at currently occupied sites from climate shifts alone. When climate-driven changes in vegetation were factored in, capercaillie lost an additional 14% on top of that, making it the hardest-hit species in the analysis. Hazel grouse, another secretive forest grouse in the region, fared even worse from climatic effects alone, with a projected 29% reduction. The three-toed woodpecker and pygmy owl also showed declines, though somewhat smaller. Of the four mountain-range regions studied, the Black Forest showed the greatest predicted climate impacts on all four species.7PLoS ONE. Temperate Mountain Forest Biodiversity under Climate Change: Compensating Negative Effects by Increasing Structural Complexity
Other notable birds include the black woodpecker, whose large oval nesting cavities become homes for dozens of other species after the woodpecker moves on. Nutcrackers, a corvid that caches pine seeds, help regenerate the region’s Arolla and Swiss stone pines. Various tit species, treecreepers, and crossbills fill the canopy, while dippers and grey wagtails work the forest streams.
Fire Salamanders and Freshwater Life
The Black Forest’s cool, shaded streams and damp forest floors are home to fire salamanders, one of Europe’s most recognizable amphibians. Their black-and-yellow warning coloration signals toxicity to would-be predators. Research on fire salamander populations found that habitat connectivity supports local abundance, because connected populations benefit from demographic exchange. But that same connectivity carries a painful trade-off: it also facilitates the spread of Batrachochytrium salamandrivorans (Bsal), a fungal pathogen that has devastated salamander populations elsewhere in Europe. Conservation measures that reduce habitat connectivity to slow Bsal transmission risk weakening the very demographic advantages that keep salamander populations healthy.8Landscape Ecology. Habitat connectivity supports the local abundance of fire salamanders (Salamandra salamandra) but also the spread of Batrachochytrium salamandrivorans
In the streams themselves, the white-clawed crayfish once occupied Black Forest waters and remains present in scattered locations across southwestern Germany. All native crayfish species in the region are protected under the Fish Protection Act. One small mercy is that non-native crayfish species, which often carry the devastating crayfish plague pathogen, have not typically invaded the same streams where white-clawed crayfish persist, and the risk of pathogen transfer remains relatively low in those isolated headwater habitats.9Bulletin Français de la Pêche et de la Pisciculture. Distribution and ecology of Austropotamobius pallipes in Germany Brown trout dominate many of the forest’s faster-flowing streams, alongside bullhead and stone loach.
An Earthworm Found Nowhere Else on Earth
Perhaps the Black Forest’s most surprising resident is Lumbricus badensis, commonly known as the Badischer Riesenregenwurm, or “Baden giant earthworm.” This species is endemic to the highlands of the southern Black Forest and is found nowhere else in the world. Field-collected adults averaged about 25 grams in fresh mass, with the largest individuals reaching 41 grams, making them several times heavier than common garden earthworms. The species is thought to have evolved relatively recently from a close relative, adapting to local soil conditions. Its range is geographically tiny, restricted by a need for humid climatic conditions, though it tolerates acidic soils that many other earthworm species avoid.10European Journal of Soil Biology. Nocturnal soil-surface behaviour of a giant earthworm in the Black Forest, SW Germany
The existence of a large, range-restricted endemic invertebrate in a well-studied European forest is a reminder of how much biodiversity can hide in the soil. Giant earthworms play outsized roles in nutrient cycling and soil aeration. Because this species occupies such a small area, it could be vulnerable to climate change, land-use shifts, or even localized pollution events that would barely register for a more widespread species.
Raccoons and Other Uninvited Arrivals
Not everything in the Black Forest belongs there. The North American raccoon has been expanding across Germany since populations established from deliberate releases and escapes in the mid-twentieth century. The scale of the expansion is striking: the number of raccoons harvested by hunters in Germany jumped from about 9,000 in the 2000-01 hunting season to roughly 71,000 by 2011-12. Their occupied range grew from about 26,500 square kilometers in 2001 to over 111,600 square kilometers a decade later, and models predict the species could spread across roughly 253,000 square kilometers by 2061, covering about 71% of Germany’s land area. Agricultural land and forest cover were the strongest predictors of where raccoons establish, and the merging of previously separate introduced populations is accelerating growth.11Biological Invasions. Assessing and predicting the spread of non-native raccoons in Germany using hunting bag data and dispersal weighted models
Habitat suitability modeling for raccoons in Europe suggests that the amount of suitable land cover exceeds current observed occurrences, meaning the species still has room to spread.12European Journal of Wildlife Research. Land cover and climatic conditions as potential drivers of the raccoon (Procyon lotor) distribution in North America and Europe Raccoons are omnivores that raid bird nests, eat amphibians, and compete with native mesopredators like pine martens. In strategically important habitats such as wetlands, they pose a direct threat to endangered species including native terrapins. For the Black Forest specifically, the concern is that raccoons could add another layer of pressure on already-stressed ground-nesting birds and amphibian populations.
Could Lynx or Wolves Return?
The Eurasian lynx and the grey wolf were both extirpated from the Black Forest centuries ago. Whether either could come back is a question that generates strong opinions on both sides. A spatial model assessing habitat suitability for lynx reintroduction across Germany concluded that the most suitable areas were large, forested low mountain ranges and extensive forests in eastern Germany.13Journal of Applied Ecology. Assessing the suitability of central European landscapes for the reintroduction of Eurasian lynx The Black Forest, as one of Germany’s largest contiguous forest blocks, fits that description in principle. Lynx have already been reintroduced to neighboring areas in Switzerland and France, and occasional individuals have been detected crossing into the wider region.
Wolves have recolonized parts of eastern and northern Germany on their own, dispersing westward from Polish and Baltic populations. A resident wolf pack in the Black Forest has not been confirmed, but lone animals have passed through. The dense forest and rugged terrain provide cover, and roe deer and wild boar provide prey. The main obstacles are political and social rather than ecological: livestock farmers worry about predation losses, and the region’s popularity with hikers and mountain bikers creates friction over large-carnivore tolerance. Any permanent return would depend as much on human willingness as on habitat quality.
How Climate Change Is Reshaping the Wildlife Community
The Black Forest sits at a crossroads where Atlantic and continental climate influences meet, and warming is already altering which species can survive there. A study of bog-specialist species in the region found that species losses were highest at lower elevations, pointing to rising temperatures and declining precipitation as the primary drivers. Habitat area, distance between sites, and land use did not play a significant role in explaining which bog species disappeared, which suggests that the climate signal is overwhelming the other factors that conservationists usually focus on.14Diversity and Distributions. Climate change aggravates bog species extinctions in the Black Forest (Germany)
For montane forest birds, the situation is similarly worrying. Climate projections showed the greatest impacts on all four modeled bird species in the Black Forest compared to three other German mountain ranges, likely because the Black Forest’s lower average elevation gives species less room to shift uphill.7PLoS ONE. Temperate Mountain Forest Biodiversity under Climate Change: Compensating Negative Effects by Increasing Structural Complexity One proposed countermeasure is to increase the structural complexity of managed forest stands so that even if the climate envelope shifts, the forest itself offers more niches. An experiment in the Black Forest National Park tested this by deliberately creating standing and downed deadwood in previously managed, single-layered Norway spruce stands. The treatment boosted deadwood volumes from about 4 cubic meters to nearly 440 cubic meters per site and increased the abundance and richness of tree-related microhabitats. The idea is that more deadwood means more cavities, more insect habitat, and more food sources for woodpeckers, bats, and other species that depend on structural variety.15PubMed Central. Enhancing structural complexity: An experiment conducted in the Black Forest National Park, Germany
Whether structural enhancement can truly compensate for rising temperatures remains an open question. The ongoing monitoring in these experimental plots covers birds, bats, small mammals, beetles, fungi, mosses, and vascular plants, so researchers should eventually have data on whether more complex forest structure translates into richer wildlife communities. For now, the Black Forest’s animal inhabitants exist in a shifting landscape where what counted as a stable home a few decades ago is becoming less predictable every year.