Yes, cockroaches in New York City can fly, and they’re almost certainly American cockroaches. These large, reddish-brown insects are about 1.5 to 2 inches long, and while they have fully developed wings as adults, they rarely use them. The exception? Hot, humid summer nights, when the conditions push them into the air and into your apartment.
Which Species Is Actually Flying
NYC has several cockroach species, but the one you see airborne is the American cockroach. It’s the largest common species in the city, reddish-brown with a tan band behind its head, and an adult wingspan wide enough to make you duck. These are the same roaches New Yorkers often call “waterbugs,” though true waterbugs are a different insect entirely. The smaller German cockroach, the one most commonly found inside apartments, does not fly.
The Oriental cockroach is another species sometimes called a waterbug. It’s about an inch long and dark brown to black. Males have short, stubby wings that are mostly useless, and females have no wings at all. If something large and winged just buzzed past your head, it was almost certainly an American cockroach.
Why They Fly in Summer Heat
American cockroaches prefer not to fly. They’re fast runners, and when startled, they typically scatter on foot. Flight is a last resort, more of a clumsy glide than controlled aviation. They launch from high surfaces like tree branches, building ledges, or fire escapes and coast downward. True sustained flight is uncommon.
What changes the equation is heat and humidity. Cockroaches become more active once temperatures reach about 68°F, and 77°F is their sweet spot. But when temperatures climb past 86°F, the heat becomes uncomfortable even for them. They sense the humidity in the air, and hot, steamy conditions seem to be what triggers their most active behavior, including short flights. That’s why New Yorkers tend to report flying cockroaches during heat waves, particularly July and August nights when temperatures stay in the high 80s or 90s and the air feels thick.
Where They Come From
American cockroaches thrive in the warm, dark, moist infrastructure beneath New York City. They breed in sewers, steam heat tunnels, boiler rooms, and the spaces around plumbing. NYC’s extensive steam pipe network, which runs under much of Manhattan, creates ideal year-round habitat: warm, damp, and full of decaying organic matter to feed on. Subway vents, grease traps, and basement drains all serve as highways between the underground and the surface.
These roaches are nocturnal and prefer tight, dark spaces during the day. At night, they emerge to search for food and water. On the hottest nights, that search takes them farther than usual, up through floor drains, out of sewer grates, and along building exteriors where they sometimes take flight from upper surfaces. First-floor and basement apartments with older plumbing are especially vulnerable entry points.
Health Risks Worth Knowing
A flying cockroach is startling, but the real concern is what it leaves behind. Cockroach proteins found in their saliva, droppings, and shed body parts are potent allergens. For people with asthma, exposure to these allergens can trigger attacks with symptoms like chest tightness, coughing, shortness of breath, and wheezing. This is particularly relevant in NYC apartments where cockroach populations can be persistent and allergen buildup happens in kitchens, bathrooms, and behind appliances.
Cockroaches also pick up bacteria as they move through sewers and decaying material, then deposit it on surfaces in your home. The health risk increases with the size of the population, so even occasional sightings of large American cockroaches are worth addressing.
How to Keep Them Out of Your Apartment
Because American cockroaches enter from outside rather than breeding in large colonies inside your walls (that’s the German cockroach’s specialty), prevention focuses on sealing entry points. The New York City Department of Health recommends several specific steps:
- Cover drains. Close off drains in showers, bathtubs, and sinks when not in use. Inexpensive rubber drain covers or metal drain screens work well. This is one of the most common entry routes for sewer-dwelling American cockroaches.
- Seal gaps around pipes. Use 100% silicone caulk around plumbing and gas pipes where they come through walls or floors. Install escutcheon plates (the metal rings that fit around pipes) after sealing for a more permanent barrier.
- Caulk cracks and seams. Seal around bathtubs, showers, sinks, where walls meet the floor, inside cabinets, and where cabinets meet the wall. Any narrow gap along a baseboard or window frame is a potential entry point.
- Fix window screens. Mend holes by weaving in small pieces of screen material. Small cuts or tears can be patched with staples or duct tape. On hot nights when windows are open, intact screens are your primary defense against roaches gliding in from outside.
- Close gaps under doors. Door sweeps on exterior doors and gaps around window frames should be addressed, especially in older buildings.
Dealing With Ones Already Inside
If an American cockroach flies or wanders into your apartment, it’s often a lone intruder rather than a sign of a nesting colony indoors. These roaches are sometimes called “sewer roaches” in the pest control world precisely because they come from outside infrastructure. A single roach on a hot night doesn’t necessarily mean an infestation.
Sticky glue traps placed along walls and near entry points like bathroom drains and kitchen pipes are effective for catching stragglers. Position them in corners and along baseboards where roaches travel, since these insects prefer to move along edges rather than across open floor. For buildings with persistent problems, granular bait scattered in garages, basements, and around the building’s perimeter can reduce the population before they make it indoors. Treating the exterior perimeter of the building is often more effective than spraying inside, since the source population lives underground and outside.
In NYC rental apartments, landlords are legally responsible for pest control. If you’re seeing American cockroaches regularly, especially coming up through drains or gaps in the building’s plumbing, that’s a building infrastructure issue your landlord or management company should address.