The Wildlife Conservation Society's Bronx Zoo veterinarians, U.S. Fish & Wildlife Service, New York State Department of Environmental Conservation, and the Massachusetts Natural Heritage and Endangered Species Program have joined forces to answer a perplexing wildlife question: Why are bog turtles getting sick?

The dilemma shines a light on North America's smallest turtle; an adult bog turtle reaches only 4.5 inches in length and as many ounces. Wildlife managers working in a few known bog turtle habitats in the Northeast have reported higher than average mortality rates for these threatened reptiles in the past few years.

To determine the cause of the increase in mortality at some sites and identify the baseline health condition at other sites, WCS's Global Health Program -- based at the Bronx Zoo -- is lending its expertise in wildlife health assessments. WCS health experts have joined federal and state wildlife managers in the field at locations in New York State and Massachusetts.