No, it is not illegal to kill a praying mantis in the United States. There is no federal law, no state law, and no local ordinance that penalizes killing one. The widely repeated claim that you’ll be fined $50 for swatting a mantis is folklore, not law.
Where the $50 Fine Myth Came From
The rumor has been circulating since at least the 1950s, and no one has traced it to a real statute. One version names a flat $50 penalty; another vaguely warns of “criminal charges.” The story probably spread because mantises look unusual and almost reverent with their folded forelimbs, so people assumed something that distinctive must be protected. Gardeners helped the myth along because mantises eat aphids, beetles, and other crop pests, and discouraging people from killing them sounded like good advice even when the legal threat behind it was invented.
No Federal Law Protects Praying Mantises
Federal wildlife protections live in Title 16 of the U.S. Code, which covers migratory birds, marine mammals, bald eagles, and endangered species. None of its chapters mention praying mantises or give common garden insects any special status. The two species you’re most likely to see in a North American yard, the Chinese mantis and the European mantis, appear nowhere in federal conservation law.
Being ecologically useful does not earn an animal legal protection. Only a formal listing under the Endangered Species Act does that, and no common mantis species has ever been listed. The Carolina mantis, the main native species in the eastern United States, is losing ground to its larger invasive relatives, but it carries no special legal status either. Killing one may be ecologically unfortunate; it is not a crime.
No State Has Protected the Praying Mantis Either
States regulate non-game animals within their borders, and many maintain their own endangered species lists that go beyond the federal one. Despite decades of rumors naming specific state codes, no state has ever enacted a law protecting any mantis species. Legislative records and wildlife agency manuals across the country do not list mantises as protected or endangered.
State wildlife agencies spend their limited enforcement resources on species actually at risk of disappearing: rare amphibians, declining birds, threatened reptiles. Common predators that reproduce abundantly every season aren’t on anyone’s priority list. If a mantis wanders into your house and you’d rather not share the kitchen, you can relocate or kill it without legal consequence.
Why Mantises Aren’t on Any Protected List
Most mantises in American gardens aren’t even native. The Chinese mantis was accidentally introduced from East Asia in 1896 and later imported deliberately to control crop pests. The European mantis arrived through similar channels. Both are now considered invasive in parts of the country, and conservation-minded gardeners are sometimes encouraged to destroy their egg cases to keep populations in check.
Chinese mantises also prey on smaller native mantises, and some entomologists believe they are contributing to regional declines of the Carolina mantis. That is an ecological problem, not a legal one. No agency has moved to list any mantis species, and no state has stepped in to fill the gap.
What Would Actually Be Illegal
The only federal mechanism that could make killing an insect illegal is the Endangered Species Act. Once the U.S. Fish and Wildlife Service formally lists a species, the ESA makes it unlawful to “take” it, a term defined broadly to include killing, harming, harassing, capturing, or collecting the animal.1Office of the Law Revision Counsel. 16 US Code 1532 – Definitions That prohibition applies to everyone under U.S. jurisdiction, on public land or private property alike.2Office of the Law Revision Counsel. 16 USC 1538 – Prohibited Acts Violations can bring civil fines, criminal fines, and in serious cases prison time.3Office of the Law Revision Counsel. 16 USC 1540 – Penalties and Enforcement
None of that applies to a praying mantis. No mantis species is listed, no mantis species is proposed for listing, and no state has created its own protection. The $50 ticket does not exist.