Coyote Swam 2 Miles to Alcatraz, DNA Test Reveals

When a wild coyote appeared at Alcatraz Island this January, tourists and scientists watched in amazement as he paddled through the choppy waters of San Francisco Bay. It was the first coyote sighting on the infamous former prison island since 1972.

Researchers initially assumed the animal swam from San Francisco, just over a mile away across the bay. But DNA testing of the coyote's droppings has revealed a much more impressive journey.

The coyote actually started his swim from Angel Island State Park, two miles from Alcatraz. That doubles the distance of what was already considered a remarkable feat through cold, choppy waters.

"We are surprised by the coyote's origin," said Bill Merkle, a wildlife ecologist with the National Park Service. "We couldn't help being impressed by his accomplishment in making it to Alcatraz."

Scientists set up cameras and audio recording equipment to track the visitor, whom some affectionately nicknamed Floyd. Researchers at UC Davis analyzed his tracks and droppings to determine where he came from.

The DNA confirmed he belonged to a coyote population living on Angel Island. The San Francisco Bay Area is home to three separate and distinct coyote populations, and this swimmer was definitely an island native.

Why This Inspires

This scrappy coyote's journey reminds us that nature finds a way, even in our modern urban landscape. His two-mile swim through challenging waters shows the remarkable resilience and adaptability of wildlife sharing our cities and parks.

The mystery deepens because Floyd hasn't been seen since those initial January sightings. He's no longer believed to be on Alcatraz Island.

"We don't know what happened to the coyote," Merkle said. "But he proved himself an expert swimmer to get to Alcatraz, and I hope he made a successful swim back home to Angel Island."

Coyotes are found throughout much of the United States, including in city parks and upscale San Francisco neighborhoods. This particular adventurer just proved they're even better swimmers than anyone realized.