A lone coyote has astonished wildlife experts after it was discovered to have swum an impressive two miles across the choppy waters of San Francisco Bay to reach the notorious Alcatraz Island.
Biologists initially speculated the resilient animal had made the shorter 1.6-kilometre (one-mile) journey from San Francisco. However, DNA analysis of tracks and scat later revealed the male coyote had undertaken an even more arduous 3.2-kilometre (two-mile) swim from nearby Angel Island.
