Kittelson, S.M. 1988. An update of the Minnesota Nongame Program's trumpeter swan restoration project. Nongame Wildlife Program, Minnesota Department of Natural Resources. 5 pp.
The Nongame Program of the Minnesota Department of Natural Resources, Section of Wildlife continued its efforts to restore trumpeter swans (Cygnus buccinator) to Minnesota in 1987. A flock of cygnets, subadults, and adults is being managed for release. The birds have been obtained from various sources.