Trumpeter swans were introduced to Turnbull National Wildlife Refuge south of Cheney in a series of cygnet releases that started in 1963. The first hatch of trumpeters documented in Washington occurred at Turnbull in 1967. A male swan later dubbed Solo was hatched during the early years and stayed on do his share of fathering during the trumpeter heydays when trumpeter pairs produced 122 cygnets at the refuge between 1967 and 1987. Then the swans disappeared, except for Solo, who returned every year until he finally found a viable mate and produced four cygnets in 2009, ending a 22-year drought. Solo and his mate raised another cygnets in 2010. But while his family has returned to the refuge since January 2011, Solo is missing and apparently gone.