Florida’s warm climate and diverse habitats make it a paradise for wildlife—but not all of it belongs here. Invasive species, introduced by humans either accidentally or intentionally, threaten native plants, animals, and the delicate balance of the ecosystem. Here are the top 10 most destructive invasive species in Florida, why they’re a problem, and what’s being done to control them.
Burmese Python
Why It’s Here: Likely released by pet owners, these massive snakes thrive in South Florida, particularly in the Everglades.
Why It’s a Problem: Burmese pythons have decimated native mammal populations, including deer, raccoons, and even alligators. With no natural predators, they continue to expand their range.
Control Efforts: Florida holds annual python hunts, and researchers are experimenting with tracking and removal programs.
Lionfish
Why It’s Here: Introduced through the aquarium trade, lionfish have spread rapidly along Florida’s coast.
Why It’s a Problem: These venomous fish consume huge amounts of native reef fish, disrupting marine ecosystems and harming coral reefs.
Control Efforts: Spearfishing tournaments and public awareness campaigns encourage divers to remove lionfish from Florida’s waters.
Green Iguana
Why It’s Here: Released or escaped pets that have established populations across South Florida.
Why It’s a Problem: Iguanas destroy gardens, damage infrastructure, and compete with native species for food.
Control Efforts: Property owners are allowed to remove iguanas from their land, and cities have implemented eradication programs.
Argentine Black and White Tegu
Why It’s Here: Another pet trade escapee, now widespread in South Florida.
Why It’s a Problem: Tegus prey on native species, including American alligator and sea turtle eggs, posing a major threat to conservation efforts.
Control Efforts: Florida has set traps to catch and remove tegus from the wild.
Cane Toad
Why It’s Here: Introduced in the 1930s to control pests in sugarcane fields.
Why It’s a Problem: Cane toads secrete a toxic substance that can kill pets and native predators that try to eat them.
Control Efforts: Public education and organized removal programs help keep populations in check.
Feral Hogs
Why It’s Here: Introduced by Spanish explorers in the 1500s as a food source; populations exploded.
Why It’s a Problem: Feral hogs destroy crops, damage ecosystems, and carry diseases that can affect wildlife and livestock.
Control Efforts: Licensed hunting and trapping programs help manage hog populations.
Nile Monitor Lizard
Why It’s Here: Likely escaped or released pets now breeding in South Florida.
Why It’s a Problem: This aggressive, carnivorous lizard preys on native birds, reptiles, and mammals.
Control Efforts: Florida wildlife officials actively trap and remove Nile monitors.
Cuban Tree Frog
Why It’s Here: Likely arrived via cargo ships in the early 20th century.
Why It’s a Problem: These frogs outcompete native frogs, disrupt food chains, and can short-circuit electrical systems by hiding in power boxes.
Control Efforts: Homeowners are encouraged to humanely remove and dispose of Cuban tree frogs.
Brazilian Pepper Tree
Why It’s Here: Introduced as an ornamental plant but quickly spread uncontrollably.
Why It’s a Problem: Forms dense thickets that crowd out native vegetation and disrupts natural habitats.
Control Efforts: The state runs mechanical removal programs and herbicide treatments.
Walking Catfish
Why It’s Here: Likely introduced through the aquarium trade.
Why It’s a Problem: This fish can move across land, invading bodies of water and competing with native fish for food.
Control Efforts: Anglers are encouraged to remove and report sightings to wildlife officials.
What Can Be Done?
Florida continues to battle invasive species through hunting, removal programs, public education, and stricter pet trade regulations. Residents can help by reporting sightings, avoiding releasing exotic pets, and supporting local conservation efforts.
Invasive Species in Florida: Trivia Quiz!
Think you know which invasive species are threatening Florida’s ecosystem? Test your knowledge with this 5-question multiple-choice quiz and learn more about the impact of these unwelcome creatures!
Links and Resources:
Florida’s Nonnative Fish and Wildlife | FWC
