State Route 62, which links Los Angeles and Joshua Tree National Park, sees hundreds of collisions between cars and wildlife every year, and conservationists plan two wildlife crossings over it. Researchers will use detection dogs to find scat from bighorn sheep, bobcats and mountain lions, then analyze its DNA before and after the crossings are built to see whether animals roam farther and genetic diversity improves. Mountain lions cut off by the highway already show kinked tails, a sign of inbreeding, which experts warn could harm the wider ecosystem. A review found only 14% of more than 300 studies on wildlife linkages assessed whether crossings changed animal movement, and California has 37 more crossings underway. The Wallis Annenberg crossing over the 101 Freeway rose from a projected $90 million to $114 million, while completed crossings averaged $16 million, and most SR 62 planning is expected by 2029.
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- This Joshua Tree highway keeps killing wildlife . Enter the poop - hunting dogs
Rescue dogs Merlin and Siska are being trained to sniff out animal droppings along State Route 62, a highway linking Los Angeles and Joshua Tree National Park that sees hundreds of wildlife collisions each year. Researchers plan to build two wildlife crossings there and will analyze the location and DNA of poop samples before and after construction to test whether they reconnect isolated populations of mountain lions and other species. Conservationists say mountain lions stuck on either side of the road already show kinks in their tails, a sign of inbreeding. Only 14% of more than 300 studies on wildlife linkages worldwide assessed whether crossings meaningfully changed animal movement. Costs vary widely: the Wallis Annenberg crossing over the 101 Freeway rose from $90 million to $114 million, while last year's completed crossings averaged $16 million, and the SR 62 project does not yet have a cost estimate.
- This California highway keeps killing wildlife . Enter the poop - hunting dogs
Rescue dogs Merlin and Siska will sniff out animal droppings in the Mojave Desert to help biologists track wildlife along State Route 62, a road linking Los Angeles and Joshua Tree National Park that sees hundreds of wildlife collisions every year. Conservationists plan to build two wildlife crossings there and will analyze DNA from dozens of droppings per species before and after construction, to see whether animals roam farther and avoid inbreeding, a problem cut-off mountain lions already show signs of. Few such studies exist: a review of more than 300 studies found only 14% assessed whether crossings notably changed animal movement. Meanwhile, California has 37 more crossings underway, and the Wallis Annenberg crossing over the 101 Freeway has risen from $90 million to $114 million.
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