Florida has spent years trying to control its Burmese python population, and the effort has produced limited results. The snakes, introduced through the exotic pet trade, have spread across the Everglades and caused significant declines in native wildlife. In some areas, raccoon and opossum numbers have fallen by about 90 percent. Researchers have also documented pythons consuming deer whole.
Hunting programs have removed thousands of snakes since 2017, including an annual state-supported competition. Professional trappers and licensed hunters work year-round along levees and canals. The effort requires considerable time and labor, and estimates of the total python population remain uncertain. Most models agree that the snakes reproduce faster than removal programs can keep up with.
A possible solution emerged from work on a different invasive species. In Guam, the brown tree snake arrived undetected in military cargo after World War II and caused severe declines among the island’s native birds, which had no experience with ground predators. By the time researchers documented the cause, dozens of bird species had stopped breeding. Scientists also recorded frequent power outages caused by snakes climbing electrical equipment.
Researchers working in Guam found that acetaminophen, the active ingredient in a common pain reliever, is highly toxic to brown tree snakes. A small dose is enough to kill an adult snake because their livers cannot process the compound. Wildlife officials developed a delivery method involving dead mice injected with the drug and dropped from helicopters into forest canopies. The technique reduced snake numbers in treated areas and received federal approval in 2003.
The Burmese python appears to share this vulnerability. Researchers studying the species have found that acetaminophen is also lethal to them. The strategy would target young pythons, which climb into trees and feed on rodents. Adult pythons are too large to be affected by a mouse-sized bait and stay closer to the water. Removing young snakes before they reach breeding age could reduce future population growth over time.
But Florida faces obstacles that Guam did not. The Everglades remain one of the most biologically diverse wetlands in North America, home to hundreds of bird species, reptiles, mammals, and fish. A large-scale bait drop would expose many of those animals to the drug. Raccoons and opossums, already reduced by python predation, feed on rodents and could consume the baits. Scavenging birds, such as vultures and hawks, may also take them. Secondary poisoning, where a predator eats a poisoned animal and is harmed by the accumulated compound, is a documented risk in such programs.
One of the most serious concerns involves the Florida panther. Only an estimated 120 to a few hundred remain in the wild, confined to the southwestern corner of the state. Acetaminophen is particularly dangerous to cats. Their livers cannot break it down safely, and even small doses can be fatal. Panthers are opportunistic feeders and may eat dead rodents found in the underbrush. The overlap between panther territory and python habitat is nearly complete, and any bait drop in that area would create a significant risk to the remaining population.
Another native species could also be affected. The eastern indigo snake, the longest native snake in North America, actively hunts and kills young pythons. It is one of the few natural predators that helps control the invasion. Its numbers have declined due to habitat loss, and government programs are currently working to breed and release them. The eastern indigo snake also feeds on rodents and could consume the baits. Its tolerance for acetaminophen has not been studied.
There are also practical limitations. Bait dropped from helicopters would not land with precision. Some would fall into water, where pythons are often found, but where fish and aquatic reptiles could also consume them. The scale required for the program to work would mean repeated drops over years, introducing the compound into a stressed wetland ecosystem repeatedly. The logistical and environmental costs would be substantial.
Public resistance is another factor. Florida has previously faced public opposition to biological control methods. In the early 2020s, a plan to release genetically modified mosquitoes in the Florida Keys drew protests, lawsuits, and heated public meetings, despite the scientific basis for the approach. A program involving millions of dead, drugged mice dropped over the Everglades would likely face similar or stronger reactions. Residents near release areas would ask how to protect pets and children from the baits. State officials would have no simple answer.
For now, Florida continues its existing control methods. Dogs trained to detect pythons by scent have helped locate snakes that researchers missed. Another technique uses captured female pythons fitted with transmitters. During mating season, males follow the females, allowing hunters to find and remove multiple snakes at once. These methods are slow and labor-intensive, but they avoid the risks of widespread chemical exposure.
No available tool matches the scale of the problem. The Everglades is a complex system where every species is connected to others. A method powerful enough to reduce python numbers is also powerful enough to harm animals that cannot survive the collateral damage. The same qualities that make the Everglades rich in biodiversity make it unsuitable for a broad chemical approach.
The situation remains unresolved. Pythons continue to reproduce in the wetlands, and no strategy currently available can match their rate of increase. The idea of using acetaminophen baits has not been adopted in Florida, and the reasons are rooted in the very nature of the ecosystem the state is trying to protect.
