A lone coyote that stunned visitors by appearing on Alcatraz Island earlier this year didn’t just take a daring dip, it likely pulled off an even longer, more grueling swim than anyone first believed. The canine was first spotted Jan. 24 on the notorious former prison island , after a visitor captured video of the unexpected guest and alerted National Park Service staff. Biologists quickly moved in, finding fresh tracks and scat, and setting up cameras and audio equipment to monitor the intruder. The coyote was first spotted January 24 on the notorious former Bay Area prison island. Instagram/@coyoteyipps Biologists moved in, finding fresh tracks and scat, and setting up cameras and audio equipment to monitor the intruder. KTVU Initially, experts thought the coyote had crossed the bay from San Francisco, a challenging swim on its own. KTVU But despite days of evidence and months of follow-up surveillance, the elusive coyote was never seen again. What happened next only deepened the mystery.…