Argentine black and white tegus, invasive lizards that can grow nearly five feet long, are spreading across Brevard County and Florida, according to the Florida Fish and Wildlife Conservation Commission. The lizards, which were first reported in the state in 2002, have been spotted as far north as Maryland and are now a growing concern for wildlife officials. Dave Yolitz of Viera encountered one on April 28 and humanely euthanized it after it entered his home. "All it takes is a couple, then we end up with a 'pythons-in-the-Everglades' sort of scenario," Yolitz said. The lizards, which can recognize humans and learn routines, are thriving in Florida's climate and are preying on native species. Officials urge residents to report sightings but warn against capturing them. Tegus raid nests of sea turtles, alligators, and ground-nesting birds, disrupting ecosystems. They are often released by pet owners, a common pathway for invasive species in Florida. Wildlife experts say the lizards are highly adaptable and difficult to control once established. "They’re not aggressive toward humans, but they will defend themselves if cornered," said a commission spokesperson. The commission has no confirmed reports of tegu attacks on people, but the lizards’ presence is increasing. In Brevard, residents are advised to contact wildlife officials immediately if they spot a tegu. The commission is working with local agencies to monitor populations and prevent further spread. Tegus are active during the day and can be identified by their distinctive black and white markings. With no natural predators in Florida, their population is growing rapidly. "We’re seeing them in more places every year," Yolitz said. "It’s a problem that’s getting worse."