A research center dedicated to apes is attracting other wildlife - trumpeter swans.
Known for its bonobos and orangutans, the Great Ape Trust of Iowa this week had the third-largest gathering of trumpeter swans in the state.
Last April, two trumpeter swans, Morgan and Olivia, were released as part of the state's reintroduction program. The nesting pair enjoy a 30-acre pond south of the bonobos' home at the Great Ape Trust.
Officials said an aerator keeps an acre of water open on the pond, and that may be what's drawing some wild trumpeter swans. This week there were 20 of the swans reported at the campus.
Iowa's largest gathering of trumpeter swans this winter was at Beemer's Pond at Webster City, with 100 swans.