|A rare Trumpeter Swan at the Seney Wildlife Refuge in Upper Michigan; 5/27/07.|
Early efforts to reintroduce this bird into other parts of its original range, and to introduce it elsewhere, have had only modest success, as suitable habitats have dwindled and the released birds do not undertake migrations. More recently, the population in all three major population regions have shown sustained growth over the past thirty year period. Data from the US Fish and Wildlife Service show 400% growth in that period, with signs of increasing growth rates over time.
One impediment to the growth of the Trumpeter Swan population around the Great Lakes is the presence of a growing non-migratory Mute Swan (see 10/9/10 blog) population who compete for habitat.
The Toronto Zoo started a conservation project in 1982, using eggs collected in the wild. Live birds have also been taken from the wild. Since then more than 180 have been released in Ontario. Despite lead poisoning in the wild from shotgun pellets, the prospects for restoration are considered good. (Information came from the Trumpeter Swan Society)