Dana Williams, a member of the UCLA team, measures the clawed paw of a yellow-bellied marmot. The researchers measure paw size and weight and take blood and stool samples from the marmots they catch.

Dana Williams, a member of the UCLA team, measures the clawed paw of a yellow-bellied marmot. The researchers measure paw size and weight and take blood and stool samples from the marmots they catch.