There is so much happening now at Ellwood Mesa and the Goleta Butterfly Grove. We are excited to share with you some of our recent progress.
Trails and Erosion Control
Sage Trail Alliance has completed enhancements to the drainage habitat and trails within the main monarch butterfly grove. They removed built up sediment and constructed earth and rock weirs to reduce erosion and create stepped pools of water. These enhancements will increase humidity, provide a water source for monarchs, and support vegetation ladders for them to climb off the ground. Trails to the viewing areas were rerouted to increase accessibility, reduce erosion, and avoid impacts to specific trees.
Sage Trail Alliance working in the drainage below the main butterfly grove, photo by Melissa Fontaine
Monarch Butterfly Science in Action
It was a disappointing year for migrating monarchs throughout California. The Xerces Society’s annual Western Monarch Count shows the migrating western monarch population was very low throughout the entire overwintering range along the coast from northern California to Baja Mexico. Experts believe the population is impacted by increasing heat, wildfire, drought and severe storms in their overwintering and breeding habitats. Many organizations and scientists are working to protect the monarchs and their habitat. As part of these efforts, the City of Goleta installed a Motus station on the Ellwood Mesa to join the scientific community in the groundbreaking capability of remotely tracking movements of individual monarch butterflies.
The Motus Wildlife Tracking System is an international collaborative research network that uses coordinated automated radio telemetry to facilitate research, education, and conservation of migratory animals. With the recent introduction of a radio tag small enough to be attached to a monarch butterfly, this technology can now be used to study their movements. The data collected from tagged monarchs will help us understand the frequency of movement within overwintering sites and between overwintering sites, migration routes, site fidelity and home ranges.
In addition to the Motus antennas, we installed two weather stations, one inside and one outside the main monarch butterfly grove, to monitor environmental conditions that affect monarch butterfly activity at Ellwood Mesa. Each station will monitor temperature, humidity, wind speed/direction, barometric pressure, rainfall, and solar radiation.
Data collected from the Motus tower and the weather stations will inform our conservation efforts and will available to the public. Links will be posted at CityofGoleta.org/Ellwood-now.
Motus Station at Ellwood, photo by Charis van der Heide
BlūMorpho radio tog on a monarch butterfly, photo by Kyle Nessen
Weather Station at Ellwood, photo by Kyle Nessen
Keep informed about all things Ellwood here and the Monarch Butterfly Grove here.