Bobcats are not uncommon in Massachusetts. They are in the city of Boston.A city resident got the surprise of her life Sunday afternoon when she spotted the elusive animal in one of the city's newest parks. Mary Ellen McMahon was walking her dog through Millennium Park, off VFW Parkway in West Roxbury, as she has so many times before when she saw the bobcat. "I had been watching this rare bird and just as I turned to walk, just out of the corner of my eye, I catch a large cat shape crossing the creek and I stopped," McMahon said. "I was, like, 'Oh, my God.'"The nearly 45-pound bobcat seemed just as startled to see McMahon. "As soon as we stopped and looked at each other, it didn't move the whole time I took photos," McMahon said. The 100-acre Boston park is a former landfill now paved with miles of trails, soccer fields and a canoe launch. It is popular with area residents and pets. Massachusetts Division of Fisheries and Wildlife said that although bobcats are common in the commonwealth, seeing one is quite rare. The division said the animals are shy, but if hungry, may go after small dogs and cats.