By Christian Schorn
Green Soldier Fly. Photo Credit: Richard Joyce
It must have looked odd. In one corner of the Blueberry Fields at Crystal Spring Farm, a group of people crept across the fields, every now and then one leaping or pirouetting with a long net on a pole. In the other, people knelt in a circle around a miniscule patch of grass, their eyes inches away from the stubby flowers. But what looked like modern dance or pagan ritual was actually naturalists at work!
On June 8th, BTLT hosted its first ever Bioblitz at Crystal Spring Farm. The goal of a bioblitz is to compile a list of all the known species in a given area over a defined period of time. Expert, amateur, and aspiring naturalists all get together and spend a morning, day, or week catching butterflies, following beetles, scoping out birds, and identifying wildflowers, recording their observations as they go. Bioblitzes can be useful for a variety of reasons—data collection, public engagement, or just a fun excuse to get outside. But why focus on these little fields?
Black Huckleberry. Photo credit: Richard Joyce
What many people know as the “blueberry fields” at Crystal Spring Farm is really a rare natural community type called a Sandplain Grassland. These prairie-like ecosystems appeared in Maine soon after the glaciers retreated, tracing the outline of the sandy glacial moraines and outwash deltas left behind. They were likely maintained in their open state through burning by the indigenous Abenaki people for blueberry farming and game hunting purposes, but after European settlement, many of these grasslands were developed, converted to agriculture, or invaded by trees as a result of fire suppression. The modern remnants of this natural community in the Northeast are ecologically enigmatic, and ranked as “extremely rare” by the state of Maine.
As stewards of the conserved land at Crystal Spring Farm, we consider it our responsibility to preserve these rare elements of Maine’s natural heritage. In the next several years, we hope to implement prescribed burns in the blueberry fields as a management tool to reduce tree and shrub cover and sustain the natural grasslands. But we won’t be able to tell how effective these treatments are unless we understand exactly how they change the landscape— so we put out a call for enthusiastic naturalists to help us!
Dryland Sedge. Photo credit: Christian Schorn
So on a warm Saturday morning in June, BTLT staff and volunteers met bright and early on the Blueberry Loop for an early morning birding hour. After hearing and witnessing uncommon grassland birds such as eastern meadowlarks and prairie warblers, we divided into two naturalist strike teams—one catching and studying insects, and the other identifying and recording plants. Pictures and identifications were uploaded to iNaturalist, an app designed to collect and share species observations from across the world. If you are an iNaturalist user, you can see our collected observations under the project “BTLT Blueberry Barren Bioblitz. Team Bug had a fruitful morning catching and observing an astounding number of native pollinators and insects such as ichneumon wasps, soldier flies, nomad bees, and pine elfins. Team Plant learned how to identify plants using botanical keys, and wielded their newfound knowledge to identify chokeberries, cinquefoils, and blue-eyed grasses, and discover endangered species under their own noses, including a vast population of the endangered velvet sedge (Carex vestita) and new populations of the rare dryland sedge (Carex siccata)!
We will be holding a second Bioblitz this summer on August 10th (check our Events page for more information closer to the event date!), to continue collecting pre-burn baseline data, and will continue to host bioblitzes in the summers following our burn management, to understand how biodiversity changed in response—like taking pictures both before and after a home renovation.
Pygmy Bee Fly. Photo credit: Richard Joyce
Apart from gaining valuable data on the biodiversity of an area, we came away with a greater and deeper appreciation of what our conservation efforts are protecting here at Crystal Spring Farm. By the end of the day, we found ourselves noticing little things we hadn’t before; a quick-fluttering day emerald moth, iridescent tiger beetles glinting in the sun, waves of velvet sedge rippling gently in the breeze, a sole pink ladyslipper standing erect above a low sea of blueberry bushes. We share our conserved places with these special species, and it’s the least we can do to get to know our neighbors.
Thanks to Richard Joyce for helping to organize this event, and to all the volunteers who showed up to help!