Rachel Fordyce, a dedicated individual working at a Cornell University entomology lab, often employed a practical method for saving money on her commute to work, involving parking at Ithaca’s East Hill Plaza and traversing the tranquil grounds of East Lawn Cemetery. It was during one of these routine walks in the spring of 2022 that her observant eye caught something truly extraordinary. The cemetery, usually a quiet expanse, was buzzing with an unusual and unprecedented density of bees, an observation that would ultimately lead to one of the most significant discoveries in entomology in recent times.
The Genesis of a Discovery: A Serendipitous Observation
The initial encounter by Fordyce was more than a fleeting glance; it was a moment of scientific serendipity. Noticing the sheer multitude of these insects, she collected a sample in a jar, driven by an innate curiosity cultivated in her professional environment. She promptly brought her findings to her supervisor, Bryan Danforth, a distinguished professor of entomology in Cornell’s College of Agriculture and Life Sciences. Her simple statement, "These are all over the cemetery," set in motion a chain of events that would redefine understanding of pollinator populations in urban landscapes.
The insects were swiftly identified as Andrena regularis, commonly known as the "regular mining bee." This particular species is a solitary wild bee, fundamentally different from the more widely recognized social honeybees. Andrena regularis constructs its nests underground, playing a crucial, yet often unsung, role in the pollination of both agricultural crops and wild plants. This initial identification was merely the prelude to a far grander revelation.
What began as a casual observation blossomed into an extraordinary scientific endeavor. Researchers at Cornell, under the guidance of Professor Danforth, subsequently determined that East Lawn Cemetery harbors one of the largest and oldest known aggregations of ground-nesting bees ever documented. The scale of this discovery is staggering: scientists estimate the site is home to approximately 5.5 million individual bees, all concentrated within a remarkably compact 1.5-acre area. To put this into perspective, the research team noted that this population density is comparable to over 200 honeybee hives and surpasses the human population of Manhattan by more than threefold within that concentrated space.
Steve Hoge ’24, the lead author of the groundbreaking study published on April 13 in the esteemed journal Apidologie, emphasized the unprecedented nature of this finding. "I’m sure there are other large bee aggregations that exist around the world that we just haven’t identified, but in terms of what is in the literature, this is one of the largest," Hoge stated. His work, conducted as an undergraduate researcher in Professor Danforth’s lab, underscores the profound impact that dedicated young scientists can have on critical ecological research. The journey from a student’s keen eye to a globally recognized scientific publication highlights the robust research environment fostered at institutions like Cornell.
Unveiling the "Regular Mining Bee": Biology and Ecological Role
The study delved deeply into the biology of Andrena regularis, a species whose ecological importance has historically been underestimated and whose specific behaviors were poorly understood. This research not only shed light on the intricate lives of these wild bees but also underscored their indispensable role as pollinators for economically valuable agricultural crops, particularly apples, a signature commodity of New York State.
Professor Danforth highlighted the broader implications of their findings, stating, "The research elevates the value of solitary ground-nesting bees and shows just how abundant these bees are, how important they are as crop pollinators, and that we need to be aware of these nest sites and preserve them." This statement resonates with a growing global concern over pollinator decline and the imperative to understand and protect diverse bee populations beyond the well-known honeybee.
Historical records provided crucial context, indicating that A. regularis has been a resident of East Lawn Cemetery since at least the early 1900s, predating many modern agricultural practices and urban developments. The cemetery itself, established in 1878, has thus inadvertently served as a continuous sanctuary for these bees for over a century. This long-term presence suggests a stable and conducive environment that has allowed the aggregation to flourish over generations.
The life cycle of Andrena regularis is fascinating and distinct. Unlike social bees, female A. regularis are solitary architects, meticulously excavating underground nests. Within these subterranean chambers, they construct individual brood cells, each provisioned with a carefully gathered mixture of pollen and nectar – a nutrient-rich meal for their offspring. An egg is laid in each cell, and the larvae develop beneath the surface, undergoing metamorphosis before emerging as adults. Hoge explained a relatively rare characteristic of this species: "This species overwinters as adults, which is relatively rare, and that’s part of the reason why they come up out of the ground so early in the spring, timed to the apple bloom." This early emergence, typically in April when daytime temperatures consistently reach around 70 degrees Fahrenheit, perfectly synchronizes with the blossoming of apple trees, fruit trees, and various wildflowers, establishing them as vital early-season pollinators.
Why a Cemetery Became a Bee Metropolis: Ideal Habitat Conditions
The discovery at East Lawn Cemetery strongly reinforces the emerging understanding that cemeteries, particularly older ones, can function as crucial refuges for biodiversity within urban and suburban environments. These green spaces are increasingly recognized for sheltering a diverse array of uncommon plants, insects, birds, and even mammals, often providing a stark contrast to the more manicured and chemically treated landscapes surrounding them.
Keven Morse, the superintendent of East Lawn Cemetery, whose family has managed the nonprofit cemetery for 46 years, corroborated these observations. He recounted seeing deer, geese, hawks, foxes, coyotes, and, of course, countless bees during his tenure. Remarkably, he noted that despite the immense bee population, he has never been stung, highlighting the non-aggressive nature of these solitary bees. Morse admitted, "I just felt bad having to mow in certain areas," acknowledging the visible presence of the bees, particularly in "probably three or four sections where they really migrate heavy." This demonstrates a degree of awareness and informal conservation practice on the part of the cemetery management.
Researchers offered several compelling reasons why cemeteries, and East Lawn in particular, provide such an ideal habitat for ground-nesting bees. Foremost among these factors is the land’s inherent peacefulness and minimal disturbance. Unlike agricultural fields or residential lawns, cemeteries are typically left undisturbed for long periods, allowing subterranean nests to remain intact. Furthermore, they are largely free of pesticides and herbicides, chemicals that are devastating to insect populations. The soil composition also plays a critical role; Danforth noted that Andrena regularis prefers sandy soil, which is abundant within the cemetery grounds. The proximity of Cornell Orchards, located about one-third of a mile from the cemetery, also contributes significantly, providing an abundant and reliable source of spring flowers and nectar, forming a symbiotic relationship that supports this massive bee aggregation.
The Science of Counting Millions: Methodology and Findings
To accurately estimate the immense bee population and meticulously study their emergence patterns, the research team employed an innovative monitoring method involving "emergence traps." These specialized traps, small mesh tents covering less than a square meter of ground, are designed to funnel emerging insects into glass jars, allowing for precise quantification and species identification. "You capture a whole community of animals coming out of the ground with this approach," Danforth explained, underscoring the comprehensive nature of the methodology.
Between March 30 and May 16, 2023, the research team strategically placed 10 such traps across the cemetery grounds. Over this period, they collected an astonishing 3,251 insects, representing 16 different species, including various bees, beetles, and flies. Crucially, Andrena regularis overwhelmingly dominated these samples, confirming their numerical superiority within the ecosystem.
Using the number of bees captured in each trap, researchers meticulously calculated the average bee density across the cemetery’s approximately 6,000 square meters (1.5 acres). Based on these detailed calculations, the estimated total population of A. regularis ranged from approximately 3 million to 8 million bees, with an average estimate settling at a remarkable 5.5 million individuals. This rigorous scientific approach provided a robust and reliable figure for the aggregation’s size.
The traps also unveiled nuanced differences in emergence timing between male and female bees, a critical aspect of their reproductive biology. Male bees were observed to appear first during warmer periods in April, preceding the females by several days. Hoge elucidated the evolutionary advantage of this staggered emergence: "The males come out first and wait for the females, so that they have the best opportunities to mate and pass on their genes." This synchronized but differentiated emergence ensures optimal mating success and the perpetuation of the species. The study’s co-authors included postdoctoral researchers Jordan Kueneman and Katherine Odanaka, undergraduate students Steve Hoge ’24 and Cassidy Dobler ’26, and lab technician Rachel Fordyce, highlighting a collaborative effort across different academic levels. Funding for this pivotal research was provided by the Cornell Atkinson Center for Sustainability, the National Science Foundation, and the Federal Capacity Funds program, underscoring the broad support for pollinator research.
Threats and Conservation Imperatives: Protecting a Hidden Treasure
While the discovery celebrates the resilience of Andrena regularis, the study also documented threats to this massive aggregation, specifically identifying brood parasitism by nomad (or "cuckoo") bees (Nomada imbricata). These parasitic bees employ a cunning strategy: they wait until A. regularis females have meticulously prepared their underground brood cells before stealthily laying their own eggs within them. Once the nomad larvae hatch, they exhibit a brutal efficiency, killing the host bee larvae and consuming the precious stores of pollen and nectar that were intended to nourish the mining bee offspring. This parasitic relationship highlights the complex ecological dynamics at play within the cemetery’s bee community.
The existence of such a vast and vital aggregation underscores the urgent need for conservation. Professor Danforth issued a powerful call to action, emphasizing, "These populations are huge, and they need protection." He elaborated on the potential for irreparable loss: "If we don’t preserve nest sites, and someone paves over them, we could lose in an instant 5.5 million bees that are important pollinators." This warning serves as a stark reminder of the fragility of even seemingly robust natural populations when faced with habitat destruction.
To aid in the location and protection of similar nesting sites globally, Danforth and his colleagues have launched a citizen science initiative. This program encourages individuals worldwide to report any ground-nesting bee aggregations they encounter, transforming ordinary citizens into crucial partners in ecological research and conservation. This initiative aims to harness the power of collective observation to identify and safeguard other hidden pollinator havens before they are lost. The implications for agricultural sustainability are significant; diverse pollinator communities, including solitary bees, are essential for maintaining crop yields and ecosystem health. This discovery serves as a potent reminder that our understanding of pollinator diversity and distribution is still incomplete, and that invaluable ecological assets may lie hidden in unexpected places.
A Model for Urban Conservation: The Future of Bee Sanctuaries
The East Lawn Cemetery discovery is more than just a scientific curiosity; it is a profound testament to the potential for urban and semi-urban spaces to serve as critical bastions of biodiversity. It challenges conventional notions of where significant ecological populations can thrive and offers a compelling model for urban conservation strategies. The ongoing protection of this site could serve as a living laboratory, offering invaluable insights into the long-term viability of large bee aggregations and the factors that contribute to their success.
This research should prompt similar studies in other cemeteries, urban parks, and neglected green spaces, potentially uncovering further hidden havens for pollinators and other wildlife. It carries significant policy implications, advocating for the protection of urban land from development, the adoption of sustainable landscaping practices that avoid pesticides, and the recognition of "unmanicured" areas as ecologically valuable. The success of undergraduate researchers like Steve Hoge and Cassidy Dobler also highlights the importance of fostering scientific curiosity and providing hands-on research opportunities for the next generation of conservationists.
The Cornell entomology lab’s continued work, driven by such unexpected discoveries, reinforces the idea that nature’s most extraordinary stories often unfold in the most unassuming settings. The unassuming pathways of East Lawn Cemetery, once just a shortcut for Rachel Fordyce, have now become a beacon for global pollinator conservation, demonstrating that even in the midst of human memorial, life in its most vital forms can flourish and endure, offering hope for the future of our planet’s essential ecosystems.
