A lone coyote that swam more than a mile across the San Francisco Bay to Alcatraz Island is being monitored by scientists and could be moved if its presence threatens birds on the infamous Californian island.
The canine, called Floyd, appears to be thriving on The Rock - renowned for its abandoned prison - and getting by on an avian diet.
Whether Floyd can stay on Alcatraz "depends entirely on how it behaves", says Aidan Moore, a local tour guide who shared footage of the coyote's journey.
Complicating matters, he adds, is that there are no fresh water sources, which could make the animal's welfare dependent on human intervention.
Video footage of Floyd - believed to be a male - hopping onto Alcatraz's rocks was captured by a tourist and shared with Moore.
