The Santa Monica Mountains are home to around 450 species of mammals, birds, reptiles, and amphibians that roam a range packed with native plant varieties. But cut off by the US 101 freeway, the mountains have become something of a genetic island. “It’s like old royalty,” jokes Beth Pratt, California regional executive director with the...
Category: Press Coverage
Wildlife bridge faces criticism—but challenges explain costs
The Wallis Annenberg Wildlife Crossing was always going to be a bold experiment—an attempt to stitch back together a landscape long severed by the Ventura (101) Freeway. Now, as the project progresses, it has also become something else: a flashpoint. Critics have seized on rising costs and shifting timelines. Originally pegged at roughly $90 million...
Wildlife bridge muscles ahead despite recent criticism
As supporters of the Wallis Annenberg Wildlife Crossing in Agoura Hills gear up for an Earth Day celebration atop the bridge over the 101 Freeway on April 22—exactly four years since the official groundbreaking—the project has come under fire for delays and cost overruns. Some of the crossing’s backers say the surge of criticism online...
How the world’s largest wildlife crossing became the target of right-wing hate
The giant bridge over US 101 in Agoura Hills should be complete later this year Last week, the newly launched California Post ran an opinion piece headlined “California’s unfinished wildlife ‘bridge to nowhere’ tops $100M.” The authors, both with the conservative think tank the Manhattan Institute, dedicated roughly 750 words to attacking the Agoura...
Wallis Annenberg Wildlife Crossing is nearly finished, but already small creatures are making it their home
In 2024, the nonprofit National Wildfire Federation began its plan to build a bridge over the 101 freeway in Agoura Hills to help mountain lions and other wildlife facing “genetic isolation” caused by the freeway. The Wallis Annenberg Wildlife Crossing is expected to be finished this year, but already small creatures are making the bridge their home...
NYT: Can Mountain Lions Survive as Humans Close In? California Is Trying to Find a Way.
For a mountain lion, the kindest intervention for a broken leg is often euthanasia. But the cub known as P-121 was getting a second chance. Found in a roadside ditch in the Simi Valley near Los Angeles, he was one of scores of California mountain lions struck by vehicles each year. At only about five...
Despite appearances, the Wallis Annenberg Wildlife Crossing is on track for fall completion
To the 300,000 drivers who stream through Agoura Hills on the 101 Freeway every day, the Wallis Annenberg Wildlife Crossing looks relatively unchanged from last summer, except for some leggy native shrubs growing along the outer walls. While activity seems to have halted on what is touted to be the world’s largest wildlife crossing, there’s...
International Los Angeles builds world’s largest animal bridge, costing $2.8 billion, to help cougars cross the street
GLOBAL NEWS: (CNA reporter Lin Honghan, Los Angeles, 21st) The California government and private sector have joined forces to spend US$92 million (approximately NT$2.8 billion) to build the world’s largest animal ecological bridge in Los Angeles, spanning a 10-lane highway, in an effort to save the endangered cougar. In recent years, there have been frequent...
The world’s largest wildlife crossing is finally getting plants. Animals are a year away
The Wallis Annenberg Wildlife Crossing Native Plant Nursery has only one function: to grow hyperlocal native plants for the world’s largest wildlife crossing over the 101 Freeway in Agoura Hills. Back in 2022, nursery employees wandered the hills around the crossing collecting a million seeds from native plants. Those seeds have been planted, replanted, nursed...
LA Times: The world’s largest wildlife crossing is entering Stage 2: What’s that mean for traffic?
The second and final stage of the Wallis Annenberg Wildlife Crossing begins in July with tasks far more challenging than the first phase. Part of this second phase involves building a tunnel along a 175-foot section of Agoura Road to connect the crossing to the Santa Monica Mountains, just west of Liberty Canyon Road. Details...








