Did you know Yellowstone releases trumpeter swan cygnets into the wild? In 1919, when swans were first documented in the park, they were considered the last population in the lower 48. By 2010, only seven swans were resident in Yellowstone. Employees like Doug Smith are trying to prevent their extirpation in the short term in two ways: 1) incubating eggs in captivity and releasing day-old cygnets near wild adults, and 2) raising cygnets to 100 days old and relocating them to areas with known breeding pairs.
Last updated: September 24, 2020