Restoration efforts in Ontario, Canada, have helped a once-vanquished population to flourish. And they have been sighted in new habitats in the United States, too.
There are more than 1,000 trumpeters in Ontario that headed north last month, many to raise their next brood. Restoration projects have also been successful in the United States, in the upper Midwest states of Minnesota, Wisconsin, Iowa, Ohio and Michigan, returning swans to at least some of the areas they inhabited before Europeans arrived in North America.
The natural population in Alaska, which became a key source for the restoration efforts, also remains strong, with more than 22,000 adults counted in the last aerial survey conducted in 2015.
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