In mid-May, Jackson biologists Susan Patla and Aly Courtemanch completed an aerial survey of harlequin ducks nesting pairs in western Wyoming. This survey of targeted stream segments in Grand Teton National Park and the Teton Wilderness is completed every five years to track the trend of nesting pairs found in Wyoming. In total, they counted 53 harlequins, similar to the number counted in 2012. The population in Wyoming represents the farthest eastern extent of the western population of harlequins which winter along the Pacific Coast north of Seattle.