Wildlife of
Taiwan

Primary Threats

• Most remaining natural lowland habitats (wetlands, river floodplains, coastal plains, and broadleaf forests) are squeezed into a narrow, heavily developed western corridor. Conversion and fragmentation affect lowland specialists such as the leopard cat and wetland-dependent birds; upland habitats are more intact but still impacted by roads, recreation nodes, and edge effects.
• High population density concentrates housing, industry, and transportation along the west coast, expanding into remnant agricultural mosaics and wetland buffers. Urban expansion increases light/noise disturbance and creates barriers that isolate wildlife populations, while driving demand for coastal engineering and water infrastructure.
• Highways, mountain roads, rail corridors, ports, airports, wind farms, and flood-control works fragment habitats and increase roadkill risk (notably for lowland carnivores like the leopard cat). In steep terrain, slope stabilization and road widening can destabilize hillsides and degrade headwater streams.
• River channelization, levees, dams, and sediment control alter flow regimes and disconnect rivers from floodplains. Coastal hardening (seawalls, breakwaters) reduces natural shoreline dynamics and can degrade intertidal habitats critical for migratory shorebirds and fisheries nursery areas.
• Industrial and urban runoff, riverborne plastics, and nutrient loads from agriculture affect estuaries and nearshore reefs. In enclosed or heavily used coastal waters and harbors, contaminants and turbidity stress coral communities and seagrass/algai habitats; in rivers, water-quality degradation impacts amphibians and freshwater fish.
• Warming seas increase coral bleaching risk around southern Taiwan and offshore islands, while ocean acidification threatens reef-building organisms. On land, more intense typhoons and extreme rainfall events drive landslides and sediment pulses that smother reefs and degrade streams; upslope shifts compress cool-adapted montane species into shrinking high-elevation refugia.
• Invasives affect farms, forests, wetlands, and islands-examples include invasive vines and plants that overgrow edges and riparian zones, apple snails and other introduced freshwater species that disrupt wetlands, and red-eared sliders competing with native turtles. On islands and ports, introduced predators and insects can pressure seabirds, reptiles, and invertebrates.
• Nearshore fisheries are heavily used, with localized depletion of reef and coastal species. High demand for seafood and intensive fishing effort reduce trophic structure and resilience of coral-reef and rocky-reef communities; bycatch and habitat impacts from some gears further stress marine biodiversity.
• Although enforcement has improved, illegal trade and collection persist for some reptiles, birds, and ornamental species. Taiwan's role as a high-income market and a transit-linked island economy can create demand pressures for exotic pets and wildlife products, requiring continual monitoring and interdiction.
• Hunting pressure is lower than historically but persists in some areas, intersecting with cultural practices and remote-access roads. Unregulated or illegal take can affect ground-dwelling birds and mammals, and snares can cause non-target mortality (including for protected species).
• High visitation to mountain forests, coastal sites, and offshore islands brings trampling, noise, litter, off-trail hiking, and wildlife harassment. Disturbance can reduce breeding success for seabirds and coastal birds, while night lighting and beachfront activity can affect sea turtle nesting beaches.
• Crop raiding and nuisance behavior (notably by macaques and some wild boar populations) create pressure for lethal control, while large carnivores and bears are rare but can come into conflict at forest edges. Conflict hot spots often overlap with fragmented lowland habitat where animals move between forest patches and farms.
• Fragmentation in the western lowlands isolates small populations (e.g., leopard cat subpopulations), increasing risks from inbreeding and demographic collapse. For island or montane endemics, limited ranges and small effective population sizes make genetic resilience sensitive to habitat breaks and climate-driven range shifts.
• Wildlife disease risks include pathogens affecting amphibians and birds, amplified by habitat stress and global connectivity. Disease surveillance is particularly important for endemic amphibians in montane streams and for migratory/wetland bird concentrations in major coastal wetlands.
• While overall agricultural area is constrained, intensification and periodic conversion at the urban-rural fringe reduce habitat heterogeneity and increase pesticide/fertilizer loads. Farmland consolidation can remove hedgerows, ponds, and fallows that serve as critical stepping-stone habitats in lowland landscapes.
• Large-scale commercial logging is much reduced compared to the past, but legacy effects (secondary forests, altered age structure) remain. Localized timber removal, road access, and plantation management can still simplify habitats and increase landslide risk on steep slopes.
• Quarrying and extractive activities (including sand/gravel extraction and localized mining) can degrade riverbeds and slopes, increasing sedimentation that affects downstream wetlands and coral reefs-especially after typhoon-driven floods mobilize disturbed material.
• High demand for water, sand/aggregate, and coastal space strains ecosystems. Water withdrawals and upstream storage can reduce environmental flows, stressing freshwater biodiversity and diminishing sediment delivery needed to sustain some coastal and deltaic habitats.