Airports attract wildlife because they concentrate food, water, and open, predator-poor habitat right beside runways. Mowed turf grows the insects and rodents that seed-eaters and raptors follow; retention ponds mimic safe wetlands for waterfowl. Roughly 74% of wildlife strikes occur at or below 500 feet, which means the airport property itself is the primary risk zone.
The most effective long-term mitigation is habitat management: changing grass species and mowing heights, removing food waste, and reshaping water so fewer animals ever have a reason to enter the flight path. Scaring birds after they arrive treats a symptom, not the chain.
One FAA-recorded event from 2025 involved a U.S.-departing civil aircraft that hit a flock of large birds gathered over irrigated grassland beside the runway, substantially damaging an engine and forcing an aborted takeoff. The airport later cleared bird-attractive plants, tightened its grass-height rules, and amended its Wildlife Hazard Management Plan.
That sequence—a damaging strike followed by habitat changes—reveals a story most travelers never see. Airports are not neutral spaces that occasionally get visited by birds; they are engineered landscapes that actively invite the animals that threaten them. Short grass, standing water, food waste, and open sightlines create a buffet for birds and other wildlife, and most of the danger happens within the first 500 feet of the sky.
What is missing from most coverage of bird strikes is the ecological chain that ties these features together, and the specific interventions that can break it.
The airport as an accidental buffet
When a reported wildlife strike in the U.S. involves a civil aircraft, birds account for 97% of events. That statistic makes intuitive sense once you look at what airports look like from the air. Mowed turf, engineered drainage, retention ponds, and open fields supply the three things animals need: food, water, and cover.
The danger skews low. Three-quarters of all wildlife strikes occur at or below 500 feet—the layer planes pass through on departure and arrival. That means the airport grounds themselves, not distant wetlands or wooded preserves, are the primary hazard zone. Water, food, and habitat attract species into the aircraft path, and that attraction is what most often creates airport wildlife hazards.
Airport operators know this, which is why the FAA and USDA treat the immediate airport environment as a safety system, not a nature reserve. Yet the public conversation often drifts toward the wildlife side of the equation rather than the chain of ecological draw.
More large birds are joining the airspace
The bigger the bird, the bigger the damage. Among the 14 heaviest North American bird species over 8 pounds, 13 of the 14 showed significant population increases over roughly two decades. The research drew from USGS Breeding Bird Survey trends matched to FAA strike records for species with 20 or more reported strikes between 1990 and 2018.
The combined population of 20 large species meeting strike-eligibility criteria grew by 27.8 million birds—a 129% rise from 21.6 million to 49.4 million. Canada geese, white and brown pelicans, sandhill cranes, wild turkeys, and bald eagles are all in the increasing group.
The FAA National Wildlife Strike Database, maintained with the USDA, records the scope: 665 bird species, 58 terrestrial mammals, 59 bats, and 46 reptiles identified as struck by civil aircraft from 1990–2025, according to the Federal Aviation Administration (FAA). That species breadth matters because it shows the hazard is systemic, not limited to one or two problem birds.
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Why short grass and standing water are the real problem
Airports mow turf for visibility and safety, but that mowing turns the ground into a food tray. A replicated field trial near Champaign, Illinois planted five turfgrass species and found that zoysiagrass, endophytic tall fescue, and Kentucky bluegrass drew noticeably fewer birds between July and October—the peak strike season—than non-endophytic tall fescue or perennial ryegrass. Zoysiagrass plots also contained significantly fewer invertebrates than any other tested species.
Grass height matters too. When Colorado researchers allowed grass to exceed 15–30 cm, grasshopper counts and American crow foraging both fell. The effect was not subtle: American crow activity and grasshopper detections were more than six times higher in short-cut grass (0–15 cm) than in uncut grass over 30 cm, according to Utah State University Digital Commons.
Another test airfield found that grass height above 30 cm deterred the presence of some hazardous bird species. The practical takeaway is that the standard practice of keeping airfields mowed low may be manufacturing the very insect and rodent food supply that pulls birds into the flight path.
JFK showed how an attractant turns into a crisis
John F. Kennedy International Airport (JFK) sits beside Jamaica Bay, home to a laughing gull colony that grew from 15 breeding pairs in 1979 to more than 7,000 pairs in 1990. The colony nested on salt-marsh islands at the end of one runway, and strike totals rose with it. Laughing gull strikes at JFK climbed from about 2 per year to as many as 187 per year.
From 1979 through August 1989, about 800 bird strikes were recorded at JFK, including 179 in 1989 alone. That crisis forced a response. An integrated mix of on-airfield culling, falconry, and waste control, tied to habitat changes, reduced bird–aircraft collisions from about 155 to 53 in one year.
The JFK case is not just a historical footnote. It shows how a specific habitat attractant, once named, can be managed. The problem is that most airport wildlife hazards are not named until after a strike.
The mechanism: breaking the chain before it forms
Habitat management works by removing the reasons animals enter the airfield. The chain starts with mowed turf and engineered drainage. Fertilizers and short grass swell insect and worm numbers. Seed-eaters and insectivores follow. Their presence pulls in raptors hunting rodents along runway margins.
Ponds and poorly drained basins are a standing invitation to waterfowl. Open views and few trees make the airfield look predator-free. Managers interrupt that sequence by changing grass species and mowing height, removing food waste, fencing or reshaping water, and simplifying landscaping.
Fewer insects means fewer rodents. Fewer rodents means fewer raptors. Following a damaging strike, airports are required by regulation to use formal Wildlife Hazard Assessments. But the most effective long-term strategy begins with removing foraging and nesting opportunities from airport property.
That is the core of habitat management. It addresses the chain before birds arrive rather than after.
Where the data runs out: three open questions
For all the work on turf and habitat, three open questions remain. First, lighting’s effect on birds is unresolved. Most published studies examine whether lights help birds detect moving aircraft, not whether different lighting changes strike risk for nocturnal versus diurnal species, and no large-sample, airport-run trial has directly compared those rates.
Second, no airport program has been documented in the published record as successfully balancing biodiversity conservation with FAA wildlife hazard management in a way that other airports can copy. That gap matters because some conservation-minded initiatives—like native grass restoration—may conflict with the safety mandate to reduce food and cover.
Third, the specific turf grass species that most attract hazardous wildlife versus native alternatives remains an open research gap. The Champaign trial tested five species, but broader comparisons across climate zones and airport settings are thin. These are not reasons to ignore habitat management; they are the next questions it needs to answer.
Key terms
- Wildlife Hazard Management Plan
- A formal document an airport uses to identify wildlife attractants on its property and set out steps to reduce the risk they pose to aircraft. The FAA requires airports to develop or update these plans after certain wildlife strike events or when a Wildlife Hazard Assessment finds a significant hazard. In the 2023 case described above, a single damaging strike prompted the airport to revise its plan by removing bird-attractive vegetation and modifying pond edges.
- Wildlife Hazard Assessment
- A structured study, usually conducted with USDA Wildlife Services, that examines an airport’s wildlife populations, habitat features, and strike history to determine whether a formal management plan is needed. The assessment is triggered by specific events, such as a damaging strike or repeated sightings of hazardous species. It is the regulatory mechanism that turns a single incident into a documented, enforceable set of habitat and deterrent measures.
- Breeding Bird Survey
- A long-running North American monitoring program that tracks bird population trends through annual roadside counts conducted by skilled observers. The survey’s data covers hundreds of species and is used by researchers to estimate whether populations are rising, falling, or stable over decades. In this article’s context, its trend estimates were matched to FAA strike records to show that 13 of the 14 heaviest North American bird species grew significantly over roughly two decades.
- Strike eligibility
- A screening threshold used in wildlife-strike research to decide which bird species are relevant to aviation risk analysis. In the Dolbeer study cited here, a species qualified if it averaged at least 1.8 kg in body mass and had 20 or more reported civil aircraft strikes from 1990 through 2018. This filter ensures that population trend analysis focuses on the birds large and frequently struck enough to matter for aircraft safety.
Questions? Answers.
Is it normal for birds to be in airports?
Yes. The FAA National Wildlife Strike Database contained 665 bird species, 58 terrestrial mammals, 59 bats, and 46 reptiles identified as struck by civil aircraft from 1990–2025. Birds are far and away the most common animals involved in wildlife strikes at U.S. civil airports.
What keeps birds away from airports?
Habitat management is the most effective long-term strategy. Specific turfgrass species such as zoysiagrass, endophytic tall fescue, and Kentucky bluegrass attracted fewer birds between July and October in trials. Letting grass grow above 30 cm reduced crow activity and grasshopper detections more than sixfold compared with short-cut grass.
What do they do with birds in airports?
Airport wildlife programs combine multiple tactics. At JFK, an integrated mix of on-airfield culling, falconry, and waste control reduced bird–aircraft collisions from about 155 to 53 in one year. Habitat changes are the foundation; active deterrents address birds that still arrive.
What US airport has the most bird strikes?
Historical records point to John F. Kennedy International Airport, where about 800 bird strikes were recorded from 1979 through August 1989, including 179 in 1989 alone. These records used a specific definition: any dead bird found within 200 feet of a runway unless another cause of death was identified.
