Disturbing photo shows mother bird feeding her chick a cigarette butt

Photographer and Audubon volunteer Karen Catbird Mason late last month captured what she believed were sweet photos of a mother bird feeding her chick on a Florida beach. However, she soon discovered it was instead a sobering picture of the impact of littering on wildlife.Mason snapped the images of the black skimmers while educating people about the birds nesting on the beach -- in her role as volunteer bird steward. "I only knew it was not a fish," she told CBS News. "I saw what it was after I