Wildlife of
Australian Capital Territory

Primary Threats

• Canberra's expansion (new suburbs and associated services) disproportionately affects the ACT's remaining lowland native grasslands and box-gum woodlands, which often occur on flatter, developable land. Urban growth increases fragmentation, edge effects (noise, light, pets), and pressure to offset rather than avoid impacts in the most constrained habitats.
• Beyond urban footprints, habitat loss in the ACT is also driven by historical clearing legacies in the lowlands, ongoing loss/degradation of old paddock trees in grassy woodlands, and conversion/management of plantation forests that can reduce habitat diversity and connectivity for woodland-dependent birds, reptiles, and arboreal mammals.
• Road upgrades and new transport/utility corridors (arterials, parkways, powerlines, pipelines, and fences) create barriers between nature reserves, increase wildlife-vehicle strikes (e.g., macropods, echidnas), and fragment linear habitats used by threatened grassland reptiles and ground-foraging birds.
• Warming temperatures, more frequent heatwaves, and drought amplify water stress in woodlands, increase the likelihood of severe fire weather, and reduce reliability of alpine/subalpine moisture regimes in the Brindabella Range. Species with restricted ranges and moisture-dependent breeding (e.g., alpine bog-associated frogs) are particularly vulnerable.
• Changed fire patterns (big, severe fires like 2003 and 2019–20) can simplify habitats, reduce tree hollows, and cause erosion and sediment pulses into waterways. River regulation and water extraction alter flows that support native fish and riparian health.
• Feral predators (cats and foxes) are a major driver of declines in small mammals, birds, and reptiles, especially in fragmented lowland reserves. Invasive herbivores (e.g., rabbits; locally deer in some areas) and invasive grasses/weeds degrade native grasslands and woodland understorey, increasing fuel continuity and reducing native plant diversity.
• Chytrid fungus (Bd) remains a key risk for ACT frog populations, compounding climate and habitat pressures-particularly for high-elevation, breeding-site-limited species. Tree health issues and dieback can also interact with drought stress, reducing canopy condition and hollow recruitment in key woodland remnants.
• Urban stormwater carries sediments, nutrients, hydrocarbons, and litter into the Molonglo and Murrumbidgee systems, affecting aquatic habitat and contributing to algal issues in urban lakes (including Lake Burley Griffin). Post-fire ash and sediment runoff can also cause acute water-quality impacts in catchments supplying Canberra's drinking water.
• High recreational use around Canberra's reserve network (dogs off-leash, mountain biking, trail creation, and visitor pressure near riparian zones) can disturb breeding birds, trample native grassland structure, spread weeds via soil movement, and increase predation risk through subsidised predator pathways along tracks/edges.
• Kangaroo-vehicle collisions and grazing conflicts in urban-edge grasslands drive contentious management (including regulated kangaroo management in some reserves). Encounters with snakes and urban wildlife (e.g., possums) can lead to harm or removal, and fencing/yard design can impede movement for species between reserve fragments.
• While broad-scale agriculture is limited within the ACT compared with surrounding NSW, peri-urban grazing and pasture improvement in remaining rural leases can degrade native grassland remnants and grassy woodland understorey, reduce native forb richness, and impede recovery of threatened ecological communities.
• Native forest logging is not a main pressure in the ACT, but forestry in large pine plantations and their roads can harm nearby reserves by edge effects, spreading weeds, and changing water flow. After harvesting, there is chance for restoration but also more erosion and weed invasion.
• Large-scale mining is limited; however, quarrying and extractive activities (and the demand for construction materials) can impact localised habitats through vegetation removal, noise/dust, and increased heavy-vehicle traffic, particularly where sites intersect lowland ecological communities.