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A lone male coyote that surprised visitors when it appeared on Alcatraz Island in January has been genetically linked to Angel Island, suggesting the animal swam roughly 2 miles (3.2 km) across San Francisco Bay to reach the former federal prison, U.S. park officials said.
The animal was first recorded on Jan. 24; biologists later found fresh tracks and scat and deployed trail cameras and audio recorders but recorded no further sightings.
DNA analysis by the UC Davis Mammalian Ecology and Conservation Unit matched the scat to a previously sampled Angel Island population, National Park Service wildlife ecologist Bill Merkle said in a May news release.
Officials had planned to capture and relocate the coyote because Alcatraz is an important seabird nesting habitat, but there is no evidence the animal remained on the island and no remains were found.
Experts say the swim likely reflected natural dispersal behavior — possibly seeking mates or territory — and underscored coyotes’ adaptability in the Bay Area.





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