The computer science that built the eBird model was powered by citizen science. More than 180,000 birders shared data with the Cornell Lab by uploading eBird checklists – tallies of which bird species they saw, and how many, in a single outing. Cornell Lab scientists then developed a model that uses eBird estimates of relative abundance for bald eagles to generate numbers of occupied nesting territories in the areas that USFWS were not able to cover in their aerial surveys.
“One of our main objectives was to see if population modeling based on eBird data would enhance the survey work the Fish and Wildlife Service was already doing,” said Viviana Ruiz-Gutierrez, assistant director of Cornell Lab’s Center for Avian Population Studies, who supervised the lab’s role in this partnership. “We’re hoping that this will allow the Fish and Wildlife Service to track bald eagle populations over a much wider area in the most cost-effective manner in the future.”
And, Ruiz-Gutierrez says, she also hopes those eagle models continue to show positive momentum. Since the USFWS delisted the bald eagle from the ESA in 2007 – a historic moment for species recovery under the act – the number of known occupied nests in the Lower 48 states has more than doubled, according to the latest report.
“It’s a great American conservation success story,” Cornell Lab Center for Avian Population Studies Senior Director Amanda Rodewald said March 24 at a virtual press conference hosted by the USFWS. She thanked the agency for hosting the event to celebrate eagle recovery, and to celebrate the role of citizen science – the thousands of birders who shared their observations to help build the population models.
“It’s heartening to see how we can all come together in different ways to conserve the birds that we all cherish,” Rodewald said. “We at the Cornell Lab hope that this is just the beginning of many more successful collaborations with the Fish and Wildlife Service.”
Gustave Axelson is the editorial director at the Cornell Lab of Ornithology.
This article also appeared in the Cornell Chronicle.