Trumpeter swan non-native Eurasian mute swan population who compete for habitat. One of the largest conservation sites for the trumpeter swan is located in Lois Hole Provincial Park. It is located adjacent to the renamed Trumpeter subdivision of Edmonton, Alberta within Big Lake. Joe Johnson, a biologist for the W.K. Kellogg Bird Sanctuary, part of Michigan State University’s Kellogg Biological Station, obtained trumpeter swans from Alaska for re-introduction to Michigan beginning in 1986. The population has grown via continued re-introductions and organic growth to 756 birds by 2015. The native swans have benefited from removal of non-native mute swans by the Michigan
Dark-winged trumpeter Dark-winged trumpeter The dark-winged trumpeter ("Psophia viridis") is a species of bird in the family Psophiidae. It is found in the Amazon rainforest of Brazil, but only south of the Amazon River and east of the Madeira River. The eastern range of dark-winged trumpeter extends into the lower adjacent Tocantins River drainage in the Brazilian state of Pará. As of 2012, this species is listed as Endangered, with the easternmost subspecies "obscura" rare. There are some differences in the colour of the back and chest in the subspecies, and it has been suggested that these should be treated as separate