Wildlife of
Goiás

Primary Threats

• Conversion of the native Brazilian savanna biome, open grasslands, and gallery forests into cropland and pasture continues to reduce and simplify habitats. Remaining native vegetation is often confined to required legal set-asides and riparian buffers, leaving many species (for example, grassland birds and wide-ranging carnivores) with smaller, more isolated populations.
• Large-scale soy and maize production, cotton in suitable areas, and intensification of cattle ranching drive ongoing clearing and drainage or alteration of seasonally wet areas. Expansion around river headwaters and plateaus increases erosion and reduces water quality and availability downstream in both the Araguaia-Tocantins and Parana basins.
• Changed fire patterns harm the seasonal savanna: frequent human-set fires along roads and pastures stop trees from regrowing, while stopping fires in parks builds fuel that later causes intense wildfires. Reservoirs and channel changes alter flows, hurting floodplain and aquatic species, especially in the Araguaia.
• Road networks (major highways and feeder roads), transmission corridors, and expanding logistics for agribusiness increase fragmentation and roadkill (notably for giant anteater and maned wolf) and facilitate land speculation and clearing. Hydropower reservoirs in headwaters of the Tocantins-Araguaia system inundate riparian habitats and alter fish and otter habitat quality.
• Agrochemical runoff (herbicides, insecticides) and fertilizer inputs from intensive agriculture, plus sedimentation from soil disturbance, degrade streams and wetlands. This is especially harmful to headwater systems and clear-water rivers used by sensitive aquatic fauna and to amphibians and insects that underpin savanna food webs.
• Hotter temperatures and longer or less predictable dry seasons increase drought stress, raise wildfire intensity, and reduce dry-season streamflows. These shifts amplify pressure on water allocation for irrigation and can shrink refuges in gallery forests and palm-swamp wetlands that species use during drought and fire.
• Exotic African pasture grasses (for example, Urochloa and Brachiaria species) spread from ranchlands into native habitats and park edges, increasing fuel loads and promoting hotter fires that disadvantage native plants. Feral pigs and other invasive or feral animals disturb wetlands and ground-nesting fauna and can spread disease.
• Subsistence and opportunistic hunting persists in rural areas, affecting large mammals (for example, peccaries and deer) and indirectly predators. Even where not widespread, localized hunting can deplete wildlife in fragments and along accessible river corridors.
• Illegal capture and trafficking of birds (including parrots and macaws) and reptiles occurs along road corridors and near towns, reducing local populations and removing breeding adults from already fragmented habitats.
• Predation on livestock can trigger retaliation against jaguars and pumas, especially near riverine forests and remaining native habitat blocks used as movement corridors. Conflict is heightened where ranching borders protected areas and where wild prey has been reduced by habitat loss and hunting.
• Fishing pressure in major rivers and floodplain lakes (notably the Araguaia system) can reduce stocks of large-bodied fish. This affects riverine food webs and can indirectly impact species like giant otter that depend on healthy fish populations.
• Nickel, gold, phosphate, and aggregate extraction in parts of Goias drives localized habitat removal, road building, and water contamination risks (sediment, heavy metals) if not strictly managed. Mining footprints can be especially damaging when they occur near headwaters and riparian zones.
• Although large-scale commercial logging is less dominant than agriculture, selective removal of native trees for fence posts, charcoal, and local timber can degrade remaining savanna woodlands and gallery forests, reducing nesting sites and structural diversity.
• Growth around Goiania, the Brasilia influence zone (eastern Goias), and mid-sized cities increases peri-urban sprawl, sand and aggregate extraction, water demand, and disturbance on nearby native habitat remnants, often in the same areas important for recreation and tourism.
• Nature-based tourism (for example, waterfalls and trails) is an economic asset in places like Chapada dos Veadeiros, but unmanaged visitation can cause trail erosion, litter, wildlife habituation, and pressure on sensitive riparian habitats, especially during the dry season when sites concentrate visitors.
• Domestic animals associated with ranches and settlements (dogs and cats) can transmit pathogens (for example, distemper and parvovirus) to wild canids such as the maned wolf and to other carnivores, particularly at the interface of protected areas and rural properties.
• Rising water extraction for irrigation and urban supply reduces dry-season flows, stressing aquatic habitats and palm-swamp wetlands. Overuse of groundwater and surface water can also intensify conflicts among agriculture, municipalities, and ecosystem needs in headwater regions.
• Fragmentation isolates populations of wide-ranging species (jaguar, maned wolf) and habitat specialists (grassland birds), increasing inbreeding risk and reducing resilience. Small native habitat remnants in heavily farmed landscapes may function as ecological islands with limited dispersal.