# Biologists Deploy GPS Trackers on Migratory Bat Species in California Researchers track hoary and western red bats to understand ecosystem dynamics in redwood forests. - **Source:** [Popular Science](https://www.popsci.com) - **Published:** 2026-10-19 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/43b0ca9e-3f42-44b3-96f0-2fe9564b8b12 ## Tracking Migratory Bat Species Biologists in California are currently tracking hoary and western red bats to map their migratory patterns. By utilizing GPS technology, researchers aim to gain insights into how these species navigate through redwood forests. This effort, conducted during Bat Appreciation Month, highlights the critical role these mammals play in maintaining local ecosystem health. ## Methodology of Mist Netting To capture the nocturnal subjects, the research team deployed specialized mist nets over creeks during dusk. These delicate, sheer nets allow scientists to safely intercept bats as they hunt for insects. Once captured, the team performs physical assessments, including measuring weight and size, before attaching the GPS tracking devices to the animals. ## Analyzing Wing Membrane Development Expert wranglers utilize headlamps to illuminate the wing membranes of the captured bats. This specific technique allows researchers to determine the age and developmental stage of each individual bat. By examining these biological markers, the team gathers essential data on population demographics within the Muir Woods National Monument and surrounding park areas. ## Ecological Impact of Bats Bats serve as essential pollinators and seed dispersers, significantly contributing to the biodiversity of redwood forest ecosystems. Furthermore, they provide natural pest control by managing insect populations. Understanding their movement is vital for conservationists, as these migratory species cover vast distances, connecting diverse habitats across North, Central, and South America. ## Species Diversity in Redwoods While the current survey focuses specifically on hoary and western red bats, the region is home to a much broader variety of species. Researchers at the Muir Woods National Monument have previously identified ten different bat species in the area. This diversity underscores the complexity and ecological richness of the protected California landscape. ## Operational Challenges in Fieldwork The process requires precise handling by expert wranglers to ensure the safety of both the researchers and the bats. Each bat is carefully removed from the mist nets and processed quickly to minimize stress. These field operations are part of a larger initiative to document wildlife behavior within the Golden Gate National Recreation Area. ## Conservation Through Data Collection The data retrieved from GPS trackers will provide a clearer picture of how these migratory mammals utilize forest resources. By identifying nesting habits in large tree holes, biologists can better protect critical habitats. This scientific approach transforms anecdotal observations into actionable data, supporting long-term conservation strategies for migratory species in the region. ## Future Implications for Ecosystems The ongoing study emphasizes the necessity of monitoring migratory wildlife to preserve environmental stability. As researchers continue to track these species, the findings will likely inform future management practices for national monuments. Protecting these nocturnal pollinators remains a priority for maintaining the ecological integrity of California’s diverse and interconnected forest environments. ## Sources covering this story - https://www.popsci.com/environment/bat-wranglers-gps-tracker-california/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._