High above Route 101, the city is building the biggest wildlife corridor in the world
Save time by listening to our audio articles as you multitaskThe cats in question are mountain lions. They live in the Santa Monica Mountains. Their numbers are stable. Their habitat is mostly pristine wilderness, full of deer, the lions’ prey. The ecology of their range, the largest urban national park in the world, is healthy, thanks in part to their presence as an apex predator. Yet animals can come under threat without habitat loss. Genetic degradation can be just as deadly.
Four years after that study came the first evidence that the big cats were suffering physical damage: a young male was found with a 90-degree kink in his tail and with only one testicle descended. Researchers had seen that before. In the early 1990s biologists studying the Florida panther, a closely related animal, found that many of the males had the same genetic flaws. The Florida panther escaped extinction only thanks to the introduction of females brought from Texas to refresh the gene pool.
Such corridors have worked elsewhere, from large spans for elk over the Trans-Canada Highway to a dinky clawbridge for migrating red crabs on Christmas Island. Angelenos raised money for theirs in a campaign that dubbed the animal in the Hollywood Hills the “Brad Pitt of mountain lions” . Last month the governor, Gavin Newsom, launched construction.
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