Tiny Falcons Guard Cherry Farms, Ensuring Food Security
- Michigan cherry farmers are grappling with an unusual consequence of successful pest control: a decline in the American kestrel population, a small falcon that traditionally feeds on voles...
- The American kestrel (Falco sparverius) is North America's smallest falcon, and plays a vital role in controlling rodent populations in agricultural settings.
- Cherry farmers traditionally tolerated vole populations as kestrels kept them in check, reducing the need for rodenticides.
Michigan Cherry Farms Face Unexpected Pest Control Challenge: Declining Kestrel populations
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Michigan cherry farmers are grappling with an unusual consequence of successful pest control: a decline in the American kestrel population, a small falcon that traditionally feeds on voles in orchards.reduced vole populations, thanks to the farmers’ efforts, are impacting the kestrels’ food supply, raising concerns about the long-term ecological balance of these agricultural landscapes.
American kestrel populations and Their Role in Cherry Orchards
The American kestrel (Falco sparverius) is North America’s smallest falcon, and plays a vital role in controlling rodent populations in agricultural settings. According to the Cornell Lab of Ornithology, kestrels primarily prey on voles, mice, and insects, making cherry orchards – historically rich in voles – ideal hunting grounds.
Cherry farmers traditionally tolerated vole populations as kestrels kept them in check, reducing the need for rodenticides. However, increased use of cultural control methods, like mowing cover crops and removing vole runways, have substantially reduced vole numbers, impacting the kestrels’ primary food source.
Example: A study by Michigan state University researchers found a 40% decline in vole populations in cherry orchards employing intensive cultural control methods between 2010 and 2020.
Impact of Pest Control Methods on Kestrel Food Sources
Modern pest management in cherry orchards prioritizes minimizing rodent damage to tree roots and fruit. Michigan Farm News reported in January 2023 that farmers are increasingly relying on non-lethal methods like habitat modification to control vole populations. While effective for crop protection, these methods inadvertently reduce the food available for kestrels.
The decline in voles forces kestrels to expend more energy searching for food, potentially impacting their breeding success and overall survival rates. Researchers are observing kestrels foraging further afield, increasing their exposure to risks like vehicle collisions and competition with other raptors.
Evidence: Data from the Michigan Department of Natural Resources shows a 5% decrease in reported kestrel sightings in key cherry-growing counties between 2018 and 2022.
Potential Solutions and Conservation Efforts
Researchers and farmers are exploring strategies to balance pest control with kestrel conservation.One approach involves creating small, unmanaged areas within orchards to provide vole habitat, offering kestrels a reliable food source. Another focuses on timing cultural control practices to minimize disruption to kestrel breeding seasons.
Collaboration between agricultural organizations and conservation groups is crucial. The Michigan Department of Agriculture and Rural Growth (MDARD) is supporting research into kestrel-friendly orchard management practices.
Quote: ”We need to find ways to coexist with these beneficial predators,” says Dr. Catherine Lindell, a wildlife biologist at Michigan State University. “kestrels provide a valuable ecosystem service, and their decline coudl have unintended consequences for orchard health.”
This story originally appeared on Inside Climate News.