SAN JUAN ISLAND, Wash. – Resident orcas are returning to Puget Sound and some scientists are hot on their trail. They're looking for whale feces, which provide clues to their health.

"We are looking for killer whale poop," said Katherine Ayers, University of Washington grad student

To do that, she perches on the bow of the research vessel, net in hand. Each poop scoop she gathers provides clues into the animals' favorite foods and their hormone levels.

Click here to read the rest of the article and view the video footage.