Several fish species actively hunt and eat birds, using strategies that range from explosive leaps out of the water to deliberately beaching themselves on shore. While it sounds like something out of a nature documentary (and it literally is), bird-eating fish are well documented across oceans, rivers, and atolls worldwide. The most notable examples are giant trevallies, European catfish, and tiger sharks.
Giant Trevally: The Fish That Hunts Birds Midair
The giant trevally is probably the most dramatic bird-eating fish on Earth. These powerful predators, weighing between 10 and 40 kilograms (roughly 22 to 88 pounds), launch themselves out of the water to snatch birds in flight. Fishing guides on Farquhar Atoll in the Seychelles reported this behavior as early as 2001, and it later became world-famous when the BBC’s “Blue Planet 2” captured it on film.
Their primary targets are sooty terns and brown noddies, both relatively small seabirds. Researchers documented hundreds of these interactions, finding that about 19% of observed attacks targeted sooty terns and 12% targeted brown noddies. Many more attacks happened too far away to identify the bird species. The fish track a bird’s shadow on the water’s surface, accelerate beneath it, and breach with enough force to grab the bird from the air. Given the energy required for a 40-kilogram fish to generate up to 50 watts of power per kilogram during a breach, the caloric payoff from a single small tern is surprisingly modest. This suggests the behavior may be opportunistic or possibly serves as practice for younger fish refining their hunting skills.
European Catfish: Beaching for Pigeons
In southwestern France, European catfish have developed a hunting technique that looks almost mammalian. Along the banks of the Tarn River, these large invasive catfish deliberately throw themselves onto shore to grab pigeons standing at the water’s edge. Fishermen working the river were the first to notice it, and researchers eventually set up cameras to study the behavior systematically.
Of 54 attempts caught on camera, just over a quarter were successful, meaning the catfish managed to grab a pigeon and drag it back into the water. That’s a respectable success rate for any predator, especially one operating outside its own element. European catfish can grow to over two meters long, giving them the body mass to lunge partially onto dry ground without stranding themselves. The behavior appears to be learned rather than instinctive, since it’s only been documented in this particular population. Scientists have compared it to orcas that beach themselves to catch seals, calling it a remarkable case of behavioral adaptation in a non-native species.
Tiger Sharks and Fledgling Seabirds
Tiger sharks in the Northwestern Hawaiian Islands time their movements around seabird nesting season. Each summer, when young albatrosses and other seabirds fledge and take their first flights over the ocean, tiger sharks gather near small islands to intercept them. Fledglings that crash-land on the water or fly too low become easy targets.
Research from the University of HawaiĘ»i’s Shark Lab found that this seasonal feeding pattern is so predictable it reshapes the entire local ecosystem. When tiger sharks congregate around nesting islands to hunt fledglings, smaller shark species are forced to shift their habitat use to avoid the larger predators. The phenomenon has been documented at French Frigate Shoals and other remote atolls, where tiger sharks have been photographed catching albatross fledglings right off the surface. Unlike the giant trevally’s acrobatic breach, the tiger shark’s approach is patient: cruise near a nesting colony, wait for inexperienced birds to hit the water, and strike.
Largemouth Bass, Pike, and Other Freshwater Predators
Bird predation isn’t limited to exotic tropical species. Largemouth bass have been observed swallowing ducklings and small shorebirds in lakes and ponds across North America. Northern pike, known for their ambush hunting style and willingness to eat almost anything that fits in their mouths, also take young waterfowl. Murray cod in Australia and African tigerfish have similarly been documented catching birds near the water’s surface.
In most freshwater cases, the targets are chicks or juvenile birds that swim or wade in shallow water. Adult birds are generally too large and too quick, but a duckling paddling across a pond is well within the capability of a large bass or pike. These encounters are opportunistic rather than specialized. The fish aren’t seeking out birds specifically; they’re ambush predators that will strike at any appropriately sized prey that enters their zone.
How Fish Target Prey Above Water
Catching a bird presents a unique challenge: the fish has to accurately judge the position of something on the other side of the air-water boundary, where light bends and distorts images. Archerfish, famous for spitting jets of water to knock insects off branches, offer the best-studied example of how fish solve this problem. Their eyes have structural adaptations that compensate for the distortion at the air-water interface, allowing them to accurately target prey at various angles above the surface.
Most bird-eating fish don’t need this level of optical precision. Giant trevallies track shadows and silhouettes rather than detailed images. Tiger sharks rely on proximity and the element of surprise. Catfish in France are hunting at the water’s edge where refraction is minimal. Still, the fact that multiple unrelated fish species across different continents have independently developed strategies to catch birds speaks to how adaptable predatory fish can be when a food source presents itself.