For three years, the U.S. Fish and Wildlife Service took eggs from nests in Canada, where the trumpeter swan population was thriving. They had a strategy; usually, trumpeter swans lay four to seven ...

They’re big. They’re beautiful. And there’s lots of them. Perhaps too many? Trumpeter swans are now reproducing at a rate no one predicted when 150 fragile eggs were transported to Minnesota from ...

Cygnets’ flight feathers — 10 of them on each wing — take 90 to 100 days to grow after they hatch. So in recent years, the trumpeters were kept until they were about a year old and their flight ...