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Ornamental Swans Spawn Conservation Crisis
27 Aug
Summary
- Ornamental swans introduced in the 1960s grew to 120 by the late 1970s.
- Park officials worried about competition with native trumpeter swans.
- Introduced swans were gradually removed, replaced by native trumpeter swans.
A private decision in the 1960s to introduce ornamental swans to a Montana pond led to an unexpected conservation challenge. By the late 1970s, the flock in Paradise Valley had swelled to 120 birds, prompting concern from Yellowstone National Park officials. The rapidly expanding population of these non-native mute swans raised fears of competition with the park's native trumpeter swans, a species already facing conservation issues.
Yellowstone staff initiated a collaborative plan with local landowners in 1987. This involved a gradual removal of the mute swans and the introduction of captive-raised trumpeter swans. This cooperative effort, supported by external funding, saw the mute swan population dwindle. By 1989, only 13 remained, and they had disappeared from the valley entirely by the mid-1990s.
The reintroduction of trumpeter swans, however, faced its own difficulties. Incidents of illegal shootings and severe flooding in 1997 and 1998 caused significant population declines. Despite these setbacks, the trumpeter swans eventually began to establish themselves. By 2005, Yellowstone Bird Report documented 24 trumpeter swans in Paradise Valley, indicating a successful, albeit challenging, restoration effort for the native species.
