New Orleans has one of the most active insect populations of any major U.S. city, thanks to its subtropical climate, high humidity, and abundant standing water. Whether you’re moving to the area, planning a visit, or just trying to figure out what landed on you, here’s what you’ll encounter and how to deal with it.
Formosan Subterranean Termites
The most destructive structural pest in Louisiana is the Formosan subterranean termite, and New Orleans is ground zero. These termites form colonies with millions of individuals, far larger than native termite species, and they cause more damage in less time. They build above-ground nests out of a material called carton, which in sandy or lime-rich soil can harden to an almost masonry-like density. The city even has a dedicated Mosquito, Termite and Rodent Control Board, which tells you how seriously the problem is taken here.
Swarm season runs from April through June, peaking in early to mid-May. The yellowish-brown swarmers fly at dusk on warm, humid, windless evenings and are strongly attracted to lights. Seeing them outdoors means there’s an active colony nearby, in a tree or structure. If you find swarmers flying inside your home or discover a pile of shed wings indoors, you likely have an infestation in the building itself. The swarmers don’t do the damage directly. It’s their offspring, the worker termites, that chew through wood and other cellulose materials around the clock.
Prevention is the best strategy. Keep vegetation trimmed at least 18 inches from your home’s exterior. Fix roof leaks promptly and address any moisture problems, since these termites need humidity to survive. Regular professional inspections are essential, especially in older and historic homes. Physical barriers like stainless steel mesh or treated vapor barriers installed during construction can block entry, and using non-cellulose building materials where possible reduces risk. If you’re buying a home in New Orleans, a termite inspection isn’t optional. It’s a necessity.
Mosquitoes
Rain and warmth make New Orleans a near-perfect mosquito breeding ground. The season begins in spring and doesn’t slow until fall, giving the city roughly six to seven months of active mosquito pressure. West Nile virus is the primary concern. It’s the most common mosquito-borne illness in the United States, and mosquito pools in Orleans Parish regularly test positive for it. Zika virus is also carried by local mosquito species, though there are currently no locally transmitted cases in New Orleans.
The city’s Mosquito, Termite and Rodent Control Board uses an integrated approach: surveillance of mosquito populations, elimination of breeding sites, larvicide treatments in water that can’t be drained, and area-wide truck and airplane spraying when populations spike. You can help by eliminating standing water around your property. Empty flowerpots, pet dishes, children’s toys, and anything else that collects rainwater. Clean gutters, refresh birdbaths frequently, and call 311 to report abandoned swimming pools, illegal dumping, or water leaks that create breeding habitat.
Palmetto Bugs
If you’ve never lived in the Gulf South, your first encounter with a palmetto bug will be memorable. These are American cockroaches, often two inches long, and they fly. They’re a year-round fixture in New Orleans, thriving in the city’s sewer systems, woodpiles, rotting trees, and palm trees. Indoors, they gravitate toward dark, moist spaces: crawl spaces, basements, bathtubs, storage rooms, and corners behind furniture.
Palmetto bugs are nocturnal, so you’ll mostly see them at night. They don’t infest homes the way smaller German cockroaches do. They typically wander or get carried inside from outdoors. Sealing gaps around doors, windows, and pipes is your first line of defense. Bait stations and gel baits work well for the ones that get through. Keeping your home dry and clutter-free makes it less appealing to them, though in New Orleans humidity, “dry” is a relative term.
Buck Moth Caterpillars
Springtime in New Orleans brings one of the city’s more unusual hazards: buck moth caterpillars. These spiny black caterpillars feed on the live oak trees that line streets and parks across the city, and most stings happen when a caterpillar drops from a branch onto someone walking underneath. The spines are connected to venom glands, and contact with skin causes an immediate burning sting followed by rash, swelling, severe itching, and pain. Some people develop allergic reactions with hives, widespread swelling, and in rare cases, anaphylaxis.
If one lands on you, don’t grab it with your bare hand. Flick it off with a stick, pen, or credit card. Then remove any spines left in your skin using tweezers or by pressing a piece of tape over the area and peeling it away. Removing the spines quickly shortens how long symptoms last. Apply an ice pack right away, then a paste of baking soda and water followed by hydrocortisone cream. An oral antihistamine can help with severe stings, and ibuprofen handles the pain. During peak caterpillar season, watch for them on sidewalks under oak trees and avoid lingering directly beneath heavy canopy.
Lovebugs
Lovebugs are small black-and-orange flies that appear in enormous swarms twice a year in southern Louisiana. The first wave arrives in late spring, and the second comes in late August through September. You’ll recognize them immediately because they fly attached to each other in mating pairs, drifting slowly through the air in dense clouds. They don’t bite or sting, but they’re a serious nuisance. They splatter on car windshields and, if left on paint, their acidic body chemistry can damage automotive finishes. During peak swarms, which last a few weeks each season, driving through a cloud of lovebugs is unavoidable on many Louisiana roads.
Keeping Bugs Manageable
Living in New Orleans means accepting that insects are part of the environment in a way they aren’t in drier, cooler cities. But practical steps make a real difference. For your home’s exterior, maintain an 18-inch clearance between vegetation and walls, repair leaks immediately, and schedule annual termite inspections. For mosquitoes, make a habit of dumping standing water after every rain. Indoors, seal entry points around plumbing and door frames, use baits rather than sprays for roaches (sprays scatter them without solving the problem), and keep food sealed and trash emptied.
Timing matters too. If you’re visiting, May evenings bring termite swarms near outdoor lights, spring sidewalks under oaks bring caterpillar risk, and summer dusk is peak mosquito time. Locals learn to turn off porch lights during swarm season, shake out shoes left by the door, and keep a can of bug spray within arm’s reach. It’s not that the bugs are unmanageable. It’s that in New Orleans, you manage them actively rather than passively.