The number of dead ducks found south of Salmon has more than doubled as wildlife officials continue to collect carcasses and search for a cause. Idaho Fish and Game biologist Tempe Regan reported finding a total of 107 dead ducks since last week along an irrigation ditch and in adjacent sloughs and ponds south of town starting last week. Initially, about 50 dead birds were found. Fish and Gameâs Mike Demick said six ducks were sent to be tested at the National Wildlife Health Center and arrived there Wednesday. âWe hope to have an early idea of what is going on by the end of the week but wonât know for sure for probably two to three weeks, depending on what tests are run,â Demick said. âWe continue to check for ducks every other day.â