What are the major concerns about the status of tri-state birds?
Although the number of swans nesting in the tri-state region has increased since the early 1900s, their numbers are relatively low. These birds, together with swans from western Canada and relocated swans in Oregon and Nevada, are part of a larger group of trumpeter swans known as the Rocky Mountain Population, which numbers more than 3,600 birds. Most of these birds winter in the tri-state area, and some people fear that such a large concentration of birds could result in many birds dying due to inclement weather, insufficient natural foods, or disease. However, increased mortality that was believed to be caused by severe winter weather has only occurred once. For years biologists have tried to establish additional wintering areas to reduce the pressure on the tri-state area, but success has been limited. Have trumpeter swans ever been listed as a threatened or endangered species? No. In the early 1900s, only about 70 birds wee known to exist in and around Yellowstone National Park. T
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