Wildlife of
Antigua and Barbuda

Primary Threats

• Warming seas drive coral bleaching and slower reef recovery; stronger hurricanes and storm surge (e.g., impacts similar to Hurricane Irma) physically damage reefs, dunes, and coastal infrastructure; sea-level rise increases erosion and saline intrusion into coastal lagoons such as Barbuda's Codrington Lagoon, undermining mangroves and nesting/roosting habitat for seabirds and turtles.
• Coastal and nearshore habitats are lost or fragmented by resort and housing development, marina/boatyard expansion, beach modification, and clearing of mangroves and coastal scrub-especially around high-value shorelines and lagoons. On Barbuda, post-storm rebuilding and land-use change have heightened pressure on dunes, wetlands, and nesting beaches.
• Land-based sources (insufficient sewage treatment, septic leakage, stormwater runoff, and solid-waste/plastic leakage) elevate nutrients and contaminants in bays and lagoons, contributing to algal growth on reefs and degraded water quality in enclosed systems. Marine litter accumulates on popular beaches and mangrove edges, affecting wildlife and tourism assets.
• High fishing pressure nearshore reduces key herbivores and predatory fish that maintain reef health; targeted and incidental harvest of species such as lobster, conch, and reef fish can stress populations when enforcement and data are limited. Fishing pressure also interacts with reef degradation, reducing resilience after bleaching and storms.
• Invasive mammals (rats and other introduced predators) on small offshore islands threaten ground-nesting seabirds and endemic reptiles through egg/chick predation. Invasive lionfish on reefs increase predation on juvenile reef fish, complicating reef recovery and fisheries replenishment efforts.
• Heavy tourism and recreational boating concentrate around reefs, beaches, and lagoons; anchor damage, trampling, and disturbance at nesting/roosting sites can reduce seabird breeding success and disrupt sea turtle nesting on frequented beaches. Increased vessel traffic also raises risks of wildlife disturbance and localized pollution.
• Roads, ports, coastal defenses, and utility corridors can fragment remaining dry forest and coastal habitats; dredging and shoreline hardening associated with harbors and marinas can increase sedimentation on nearby reefs and alter water flow in lagoons and mangrove creeks.
• Dredging, land reclamation, shoreline armoring, and engineered channels modify natural coastal processes (sand movement, lagoon flushing), often increasing turbidity and sediment stress on coral reefs and seagrass beds and reducing the storm-buffering function of dunes and mangroves.
• Opportunistic take of wildlife (including occasional take/harassment of nesting sea turtles and seabirds) can occur where access is easy and enforcement is thin, adding pressure to species already stressed by habitat loss and disturbance.
• Risks include illegal or unregulated trade in protected wildlife products (e.g., turtle-derived items) and collection/possession of native fauna, which is particularly consequential for small, localized populations on offshore islets.
• Coral diseases in the wider Caribbean (and disease outbreaks facilitated by heat stress) pose an increasing risk to Antigua and Barbuda's reef-building corals, potentially causing rapid tissue loss and reducing reef complexity that supports fisheries and shoreline protection.
• Several conservation-priority species persist in very small, isolated populations (notably the Antiguan racer), making them vulnerable to genetic bottlenecks and stochastic events; hurricanes can further compress populations and reduce genetic diversity if refugia are limited.
• Extraction of coastal resources (e.g., sand removal in localized areas, heavy pressure on nearshore fisheries, and overuse of limited freshwater supplies) can degrade habitats and reduce ecosystem services, particularly during drought periods and peak tourism seasons.
• Expansion of settlements and tourism-related services around St. John's and along coasts increases impervious surfaces, runoff, light/noise pollution near nesting beaches, and demand for coastal land-intensifying cumulative impacts on reefs, mangroves, and lagoons.
• While large-scale agriculture is limited, localized land clearing and grazing in dry forest areas can increase erosion and sediment runoff to nearshore waters after heavy rain, adding chronic stress to coral and seagrass habitats.