CDFW Introduces New Digital Tools to Track Wildlife Connectivity, Barriers

Fri, 08 Aug 2025 13:13:45 GMT

The California Department of Fish and Wildlife (CDFW) is pleased to announce the launch of a new suite of online tools to help identify and address wildlife connectivity barriers across the state. These resources will make it easier for the public, planners, and partners to explore known barriers to wildlife movement and understand where action is needed to support animal migration and road safety.

“I am thrilled we can share these new online tools that will advance collaboration with our partners and ultimately improve wildlife connectivity and movement across the state,” said CDFW Director Charlton H. Bonham. “California is making tremendous progress on identifying and resolving wildlife connectivity barriers as exemplified by the Annenberg Wildlife Crossing in Southern California, the largest wildlife crossing of its kind in the nation now in the final stages of construction.”

Habitat connectivity is essential to the health and resilience of wildlife populations – especially in the face of increasing development and climate change. Transportation and other linear infrastructure can block wildlife movement, isolate populations, reduce genetic exchange and lead to increased wildlife-vehicle collisions. Addressing these barriers is critical to protect California’s diverse wildlife populations and provide increased road safety.

CDFW’s new Wildlife Connectivity Barriers web page features an interactive map and additional resources that allow users to identify, explore and understand the locations of known wildlife movement and barriers.

Key features of the Wildlife Connectivity Barriers web page include:

An interactive map showcasing over 200 high-priority barrier segments across 3,000 miles of roadways and infrastructure.
A searchable database with detailed information on each barrier, including species affected (e.g., deer, mountain lions, amphibians, reptiles) and prioritization data.
Online tools to export data, zoom in on relevant areas of interest, and print focal areas of concern.
Resources for planners and partners to inform conservation, restoration, and infrastructure planning.

In recent years, CDFW has taken major steps toward a more strategic and science-based approach to identifying and remediating wildlife connectivity barriers. The new digital tools build on CDFW’s first statewide assessment of priority barriers in 2020 (updated in 2022). This transition to an online format continues to build on years of interagency and partner collaboration and is designed to make barrier data more accessible, dynamic, and user-friendly.

This effort also leverages the 2024 California State Action Plan (PDF) developed under U.S. Department of Interior Secretarial Order No. 3362, which supports the conservation of big-game migration corridors across the western United States. Of the barriers identified in California, 21 intersect with lands prioritized under this plan, highlighting routes essential to ungulate species.

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Media Contacts:
Juan Torres, CDFW Wildlife Branch, (916) 268-3079
Peter Tira, CDFW Communications, (916) 215-3858

California Prioritizes Key Locations to Improve Wildlife Connectivity

Wed, 15 Mar 2023 15:25:39 GMT

The California Department of Fish and Wildlife (CDFW) has released an updated report identifying the most important areas to advance wildlife connectivity projects. The report, “Restoring California’s Wildlife Connectivity 2022 (PDF),” prioritizes which roadways, railways and other human-created infrastructure are the greatest barriers to wildlife movement addressing where habitat connectivity projects are needed most. The report lists 62 obstacles statewide, with 12 of those recognized as top priority barriers to remove. A vast majority of the barriers are part of the state highway system, but rail lines and canals also limit the ability of wildlife to roam freely.

The new report underscores California’s international leadership on improving wildlife connectivity. It is also a key strategy (PDF) within California’s landmark 30x30 target, which calls for the state to conserve 30 percent of its land and coastal waters by 2030 and identifies wildlife overcrossings as a means of protecting California’s biodiversity. The new connectivity report serves as an important guide to state, federal, tribal and local governments as they work together to improve wildlife connectivity.

“Connectivity is essential to life; it’s key for us as people and the same is true for animals,” said CDFW Director Charlton H. Bonham. “Animals need connection to habitat, places to live, to thrive, food and water, and freedom and room to roam. This report highlights top obstacles to that freedom and room to roam within the state so California can take appropriate action to right those wrongs.”

The 2022 report expands upon CDFW’s 2020 report with additional barrier information, and the new version is expected to play a major role in the California Department of Transportation’s (Caltrans) road project designs to reduce the number of wildlife collisions. A recently signed Safe Roads and Wildlife Protection Act requires Caltrans to identify barriers to wildlife movement and prioritize crossing structures when building or improving roadways.

“Barriers are one thing humans have control over because they’re man made,” said CDFW Senior Environmental Scientist Melanie Gogol-Prokurat. “We are excited to remediate them and fix issues so wildlife can move across the landscape. If a population becomes isolated it can lead to inbreeding, which causes detrimental effects and can eventually lead to the population dying out.”

Current California examples of wildlife-friendly infrastructure include the recently approved Annenberg Wildlife Crossing in Agoura Hills, northwest of Los Angeles, and the Laurel Curve project, a Highway 17 undercrossing in Santa Cruz County, on which construction is nearing completion.

The state’s 12 top priority barriers featured in “Restoring California’s Wildlife Connectivity 2022” stretch from a section of Highway 101 near the Oregon state line to a piece of Interstate 8, just north of the U.S./Mexico border.

“We’re thrilled to be a part of this shift to big-picture thinking for wildlife,” said Bonham. “We’ve got funding from the State Legislature and the Wildlife Conservation Board to invest in connectivity projects, and we’re finding actual projects on the ground in our partnership with Caltrans that are really making a difference.”

The full Restoring California’s Wildlife Connectivity 2022 (PDF) spatial datasets are available in the Habitat Connectivity Viewer in CDFW’s Biogeographic Information and Observation System (BIOS). For additional information about CDFW’s Habitat Connectivity data and analysis, see the CDFW Terrestrial Habitat Connectivity web page. Information about funding opportunities is available at Restoration Grant Opportunities – Accepting Concepts.

For additional information, including interviews with CDFW and Caltrans leadership, please watch this video news release.

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Media Contact:
Jordan Traverso, CDFW Communications, (916) 212-7352

CDFW News

CDFW Introduces New Digital Tools to Track Wildlife Connectivity, Barriers

California Prioritizes Key Locations to Improve Wildlife Connectivity