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All Three Populations of North American Trumpeter Swans Are Increasing

10,000 Birds

During the 1980s, the Pacific Coast Population swans became the source of eggs for several restoration programs in Minnesota, Michigan, Ohio, Wisconsin, and Iowa 2. The Trumpeter Swan Society lists these as: Lead Poisoning – occurs when swans ingest lead shot or lead fishing sinkers in wetlands and lakes.

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Comebackers

10,000 Birds

is going to have to go to Michigan or Wisconsin. Not only were they a common bird, they were a common bird nearshore; indigenous peoples hunted them up and down the coast. The most notorious effect is that their eggshells become so thin that a parent bird will crush it’s eggs while attempting to incubate them.

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