AP Photo

A new study by the Dauphin Island Sea Lab in Alabama finds that tiger sharks in the Gulf of Mexico are eating a lot more than fish and other marine life. Their diet also includes land-based birds, such as woodpeckers, tanagers, meadowlarks, catbirds, kingbirds and swallows.

The question is how these birds end up in a shark's stomach and the American Bird Conservancy thinks it might have the answer.