December 2025


California Oaks, in partnership with California Oaks Coalition, is perpetuating and protecting oaks throughout California and beyond. We hope you and yours are well as the light dwindles and we approach the end of 2025.


California Oaks teamed up with the Global Conservation Consortium for Oak to convene a 3-day blue and valley oak conservation action planning workshop in November. Hosted by The Wildlands Conservancy, the workshop was held at a conference center at a newly acquired preserve in Monterey County, on ancestral lands of the Esselen Tribe. It engaged members of a Blue and Valley Oak Workgroup, which has been meeting since April 2024, and other key stakeholders. Over half of the participants have been working with oaks for 10 years or longer.


One focus area of the emerging action plan is land conversion. This is an important issue because California is losing its oak woodlands. Just a day before the workshop, a decision to approve oak removals for a solar development was issued. The article below summarizes some of the oak impacts of that project.

Oak woodlands at Coyote Creek

South Sacramento Habitat Conservation Plan

Oak Woodland and Savanna provide important cover, nesting, and roosting sites for native bird species, as well as caching sites for acorn storage, for a variety of birds, mammals, and other native species. Covered Species that use Blue Oak Woodland and/or Savanna include American badger, western red bat, Cooper’s hawk, western burrowing owl, and white-tailed kite. Where suitable aquatic land cover occurs in association with Blue Oak Woodland and Blue Oak Savanna land cover, California tiger salamander, western spadefoot, and western pond turtle may also occur. Old, large oak trees are of particular habitat value, providing an array of living and dead branches as sites for woodpeckers to excavate cavities and for insect-eaters to forage for larvae and adult insects. Dead branches and trunks are critically important for cavity nesting birds, for mammals as storage sites for acorns, and as perches for sight-dependent predators, such as raptors (Gutierrez and Koenig 1978). The fallen logs of dead oaks provide sustenance and cover for arthropods, fungi, and wildlife, and may potentially extend activity periods for these species in drier climates by retaining soil moisture and providing shade (Giusti et al. 2004). Oak trees produce a critically important food crop, acorns. (South Sacramento Habitat Conservation Plan, Volume 2 Appendices, Page E1-19)

Sacramento County overrides oak protections

California's goals for protecting biological diversity and cultural resources are often overridden by the development of renewable energy sources. The November 2025 approval of a solar project in Sacramento County underscores the willingness of decision makers to degrade natural and cultural resources in the name of "clean" energy.


The Coyote Creek Agrovoltaic Project will develop 1,554 acres of blue oak woodland, blue oak savanna, and grassland on a 2,704 acre property in southern Sacramento County. The location's oak trees are Tribal cultural resources and the land is likely home to Tribal burial sites, remnants of settlements, and artifacts.


California Wildlife Foundation/California Oaks' review of the project's environmental documentation found it to be inconsistent with Sacramento County's General Plan. The plan's Public Facilities Element calls for solar electric facilities to be located away from sensitive habitats, sited instead where impacts will be minimized. The Conservation Element is unambiguous in stating the need to ensure no net loss of the county's wetlands, riparian woodlands, and oak woodlands. Instead 3,493 trees will be destroyed, many of which are mature native oaks. The fragmentation of the remaining acres will degrade their habitat value, with remaining connectivity corridors below thresholds recommended by California Department of Fish and Wildlife.


The Board of Supervisors' unanimous approval of the project also violated the General Plan's mitigation requirements, with mitigation ratios dramatically below those articulated in the General Plan. Even if the replanting requirements were stronger, an oak takes many years to produce acorns and provide other ecosystem services destroyed by the removal of a mature tree.


A segment of the project is within the South Sacramento Habitat Conservation Plan area. (A section of the plan is quoted above.) Eleven of the vertebrate species covered by this plan are identified by California Department of Fish and Wildlife’s California Wildlife Habitat Relationship information system as oak-associated, including the following, which are believed to occur at the project site (with Latin names provided for those with state or federal endangered species act designations): American badger, Northern Harrier, Swainson’s Hawk (Buteo swainsoni, state threatened), Western Burrowing Owl (Athene cunicularia hypugaea, state candidate), western pond turtle (Actinemys marmorata, federal candidate), western spadefoot, and White-tailed Kite (Elanus leucurus, California fully protected). Another oak-associated vertebrate that utilizes the site is the Bald Eagle (Haliaeetus leucocephalus, state threatened and fully protected).


Additionally, a number of the habitat conservation plan’s covered invertebrates and plants are considered to be oak-associated species, based on cross-references of California Natural Diversity Database occurrence records with the oak woodland dataset in California Department of Fish and Wildlife’s Areas of Conservation System: Crotch's bumble bee (Bombus crotchii, state candidate), Boggs Lake hedge-hyssop (Gratiola heterosepalam, state endangered), dwarf downingia, legenere, pincushion navarretia, Ricksecker's water scavenger beetle, Sanford's arrowhead, slender Orcutt grass (Orcuttia tenuis, federally threatened and state endangered), and valley elderberry longhorn beetle (Desmocerus californicus dimorphus, federally threatened). Another oak associated invertebrate that utilizes the site's habitat is the vernal pool fairy shrimp (Branchinecta lynchi, federally threatened).


The project also runs counter to Sacramento County's Climate Action Plan, which recognizes the importance of oaks growing in the South Sacramento Habitat Conservation Plan area in sequestering carbon and providing habitat connectivity. The county's 2017 carbon assessment also calls out the importance of oak trees in carbon sequestration.


The environmental analysis also did not use best available science. For example, impacts on groundwater dependent species were improperly assessed. A threshold depth of 30-feet was used for valley oak, a groundwater dependent species that will be impacted by the project. The Nature Conservancy's Groundwater Resource Hub lists valley oak rooting depth at 80-feet.


California Wildlife Foundation/California Oaks appreciates the need for California to adhere to climate goals, but a better path to reaching climate goals is to keep native oaks standing. An extractive project such as Coyote Creek is an ill-conceived approach. Sacramento County chose to disregard the natural and cultural values of the landscape that support local communities, ignoring strong opposition to this project. California must enforce protections for oaks. We can all hold decision makers responsible by participating in elections, reviewing development projects, and by advocating for oak protections.


Next Steps: California Native Plant Society, a member of California Oaks Coalition, and partners hosted a community meeting on December 9, 2025, to explore next steps.


To learn more: The Environmental Council of Sacramento (ECOS) has a webpage about the project or reach out to Brendan Wilce Conservation Program Coordinator of California Native Plant Society.

Black oak at Big Sur. © Photo courtesy of Tom Gaman.

California Oaks Coalition

Organizations partnering with California Oaks to conserve oak woodlands and oak-forested lands for future generations: Alameda Native History Project; Amah Mutsun Land Trust; American River Conservancy; American River Watershed Institute; Anderson Valley Land Trust; AquAlliance; Audubon California; Baduwa't Watershed Council; Butte Environmental Council; California Institute for Biodiversity; California Invasive Plant Council (Cal-IPC); California Native Plant Society (CNPS), including Dorothy King Young Chapter, El Dorado Chapter, San Diego Restoration Committee, Sanhedrin Chapter, and Yerba Buena Chapter; California Rangeland Trust; California State University Chico Ecological Reserves; California Water Impact Network (C-WIN); California Wilderness Coalition (CalWild); Californians for Western Wilderness (CalUWild); Canopy; Carrizo Plain Conservancy; Center for Biological Diversity; Central Coast Heritage Tree Foundation; Chimineas Ranch Foundation; Clover Valley Foundation; Coastal Corridor Alliance: Conejo Oak Tree Advocates; Confluence West; Dumbarton Oaks Park Conservancy; Earth Discovery Institute; El Cerrito Trail Trekkers; Endangered Habitats Conservancy; Endangered Habitats League; Environmental Defense Center; Environmental Protection Information Center (EPIC); Environmental Water Caucus; The Fire Restoration Group, Foothill Conservancy; Forest Unlimited; Forests Forever; Friends of Harbors, Beaches and Parks; Friends of Olompali; Friends of Spenceville; Friends of the Richmond Hills; Global Conservation Consortium for Oak; Hills For Everyone; Laguna de Santa Rosa Foundation; LandPaths; Loma Prieta Resource Conservation District; Lomakatsi Restoration Project; Los Padres ForestWatch; Lower Kings River Association; Micke Grove Zoo; Mountains Recreation and Conservation Authority; Northern California Regional Land Trust; Ojai Trees; 100K Trees for Humanity; Pacific Birds Habitat Joint Venture; Placer Land Trust; Planning and Conservation League; Point Blue Conservation Science; Redbud Audubon Society–Lake County; Redlands Conservancy; Regrounding; ReLeaf Petaluma; Resource Conservation District of Santa Monica Mountains; River Partners; River Ridge Institute; Rural Communities United; Sacramento Tree Foundation; Sacramento Valley Conservancy; Santa Barbara Botanic Garden; Santa Clarita Organization for Planning and the Environment (SCOPE); Save Lafayette Trees; Save Napa Valley; Sequoia Riverlands Trust; Shasta Environmental Alliance; Sierra Club Northern California Forest Committee–Oak Woodland Subcommittee; Sierra Club Placer Group; Sierra Foothill Conservancy; Smith River Alliance; Stewards of the Arroyo Seco; Tejon Ranch Conservancy; Tending the Ancient Shoreline Hill; Tuleyome; Universidade de Trás-os-Montes e Alto Douro, Department of Forest Sciences and Landscape Architecture (Vila Real, Portugal); University of California Botanical Garden at Berkeley; University of California Los Angeles Mildred E. Mathias Botanical Garden; Ventura Land Trust; Western Shasta Resource Conservation District; Woodland Tree Foundation; and Yosemite Rivers Alliance.

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Please reach out to amoskow@californiaoaks.org if oak woodlands or oak-forested lands in your area are threatened.

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