Cooperative Fish and Wildlife Research Units Program:
Education, Research and Technical Assistance for Managing Our Natural Resources


Assessing reintroduction efforts and evaluating recovery goals of trumpeter swans in Iowa using an integrated population model

November 2021 - December 2023


Participating Agencies

Trumpeter swans were extirpated from many Midwest states, including Iowa, but reintroductions started in the 1990s have been very successful. Over 1,200 captive-bred swans have been released in Iowa over the past 30 years, with ongoing banding and monitoring by the Iowa DNR. With this study, we will use that historical data to estimate past demographic rates and then project the population into the future to determine whether reintroductions are still needed to maintain a stable population.