Megan Isadore, co-founder of the River Otter Ecology Project, waits for a glimpse of a river otter Thursday, Jan. 3, 2013, in San Francisco. For the first time in decades, a river otter

 

              Megan Isadore, co-founder of the River Otter Ecology Project, waits for a glimpse of a river otter Thursday, Jan. 3, 2013, in San Francisco. For the first time in decades, a river otter
Megan Isadore, co-founder of the River Otter Ecology Project, waits for a glimpse of a river otter Thursday, Jan. 3, 2013, in San Francisco. For the first time in decades, a river otter has made San Francisco its home, taking up residence in the ruins of the Sutro baths, a 19th century seaside public pool facing the Pacific Ocean. (AP Photo/Ben Margot)