This summer, a sophisticated tracking study conducted at Lido Beach, New York, unveiled a complex narrative of survival, resource scarcity, and the profound ecological dependency of Black Skimmers on a single, vital forage fish species: the Atlantic menhaden. Co-authored by researchers and Brien Weiner of the South Shore Audubon Society, which serves the southern half of Nassau County, the study involved fitting 20 Black Skimmers with advanced GPS transmitters to monitor their foraging habits. While the primary objective was to map local back-bay activity, the resulting data exposed a desperate search for sustenance, with birds traveling up to 110 kilometers (68 miles) to reach New Jersey’s Gateway National Recreation Area.
The Methodology of the Tracking Study
The research team deployed GPS transmitters on 20 adult Black Skimmers nesting at the Lido Beach colony. Black Skimmers (Rynchops niger) are unique among North American birds for their specialized feeding method, which involves flying low over the water with their elongated lower mandible slicing the surface to catch prey. Because of this specialized behavior, they are highly sensitive to the spatial distribution and density of schools of forage fish.
The tracking data collected between June and August 2026 provided a high-resolution view of the birds’ flight paths. Researchers identified distinct behavioral patterns, including gender-based foraging territory partitioning. Males generally concentrated their efforts in the marshes west of the colony, including the ecologically significant Bay Park area—a site currently undergoing extensive infrastructure upgrades to improve water quality in the back bays. Conversely, females exhibited a preference for eastern foraging grounds.
Chronology of a Foraging Crisis
The tracking project revealed that the early nesting season was characterized by significant food stress. During June and July, the lack of locally available Atlantic menhaden forced the birds to undertake extraordinary, energy-intensive foraging trips.
A prime example of this extreme behavior was "Michelle," a seven-year-old bird hatched at the colony in 2019. Michelle distinguished herself as the only tracked individual to cross the Long Island Sound, establishing a route that took her as far as Bridgeport and New Haven, Connecticut. Her journeys also extended to the Bronx and areas east of the colony near Babylon. Meanwhile, "Ronald," an adult male, favored nighttime excursions, regularly flying to the Sandy Hook and Gateway National Recreation Area in New Jersey.
The data indicated that many of these long-distance flights occurred between 10 p.m. and 3 a.m. This nocturnal foraging behavior is a hallmark of desperation; when local food sources are insufficient, the energy expenditure required to fly long distances under the cover of darkness becomes a necessary trade-off for the survival of the chicks.
The turning point in the study occurred between July 31 and August 8. During this period, Atlantic menhaden, often referred to as the "most important fish in the sea," returned to the local waters surrounding Long Island. The response from the colony was immediate and observable: the birds abandoned their long-range, energy-taxing commutes and resumed concentrated foraging in the back bays close to their nests.
The Ecological Role of Atlantic Menhaden
The Atlantic menhaden (Brevoortia tyrannus) is a filter-feeding forage fish that serves as a foundational component of the Atlantic coastal food web. These fish are not only critical for Black Skimmers but also represent a primary energy source for apex predators, including osprey, bald eagles, humpback whales, and various commercially and recreationally important fish species such as striped bass.
Data collected in 2024 revealed that menhaden comprised approximately 41 percent of the diet of Black Skimmer chicks at the Lido Beach site. When the availability of this specific prey dropped during the early 2026 breeding season, the physiological and reproductive impact on the colony was stark.
Productivity, measured by the number of fledged chicks per nesting pair, serves as a vital indicator of colony health. Historically, the Lido Beach colony maintains a productivity rate between 0.31 and 0.38. However, in 2026, the productivity rate plummeted to 0.25. Researchers attribute this decline directly to the early-season food scarcity, which forced parents to spend less time brooding and feeding their chicks due to the excessive time spent traveling in search of prey.
Regulatory Implications and Future Protections
The findings from the Lido Beach study arrive at a critical juncture for regional environmental policy. The Atlantic States Marine Fisheries Commission (ASMFC), which manages the harvest of menhaden along the Eastern Seaboard, is scheduled to vote this November on an addendum aimed at revising fishing limits.
Conservationists and ornithologists argue that the data from the 2026 nesting season provide a compelling case for increased protections. By ensuring that menhaden populations remain robust within the nearshore environment, regulators can provide a buffer against the types of food shortages observed this summer. If the ASMFC moves to limit industrial extraction of menhaden in the Mid-Atlantic, it would likely yield cascading benefits for coastal bird populations that rely on these schools of fish during their most vulnerable reproductive phases.
"Protecting our fish is essential to ensuring that migrating and nesting birds have the resources they need to thrive along the Atlantic flyway," noted members of the research team. The implication is that the Lido Beach colony, while one of the largest on Long Island, is not an isolated system; its viability is intrinsically linked to the management of marine resources hundreds of feet below the birds’ flight paths.
Analysis: Why Lido Beach Matters
The Lido Beach colony is considered a bellwether for the health of the Atlantic flyway. By analyzing the variables that contribute to its success or failure, scientists can develop more effective conservation strategies for other colonial waterbirds. The 2026 study highlights a shift in ecological pressure: while habitat destruction and predation are often cited as the primary threats to nesting success, this research underscores that forage fish availability is an equally significant, if less visible, limiting factor.
The investment in GPS tracking technology has provided more than just movement data; it has provided a clear, cause-and-effect relationship between industrial-scale marine management and the survival of local wildlife. The behavior of birds like Michelle and Ronald serves as a tangible metric of ecosystem health.
As the state of New York and the ASMFC prepare to deliberate on the future of menhaden management, the data from the Lido Beach colony stands as a clear record of the risks associated with current harvest levels. The challenge for policymakers will be to balance the commercial demand for menhaden—which are harvested for fishmeal, fertilizer, and bait—against the biological requirement of a thriving coastal ecosystem.
Conclusion
The summer of 2026 will be remembered by researchers as a year of profound discovery regarding the vulnerability of Black Skimmers. The tracking project confirmed that these birds are highly adaptable and capable of extraordinary navigation to find food. However, the energy cost of that adaptability is high, as evidenced by the diminished productivity of the colony.
By mapping the movements of these 20 birds, the South Shore Audubon Society and their partners have successfully linked the macroscopic behavior of a nesting colony to the microscopic availability of a single species of fish. As the November vote approaches, the survival of future generations of Black Skimmers at Lido Beach may well depend on the recognition that the health of our birds is inextricably tied to the health of the forage fish they depend upon. The story of the Lido Beach Skimmers is ultimately a reminder that even the most resilient species require a stable foundation of resources to sustain their place in the environment.
