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These calls were made by birds foraging in a field in June. The call starts with a rattle. The latter part of the call may have been a duet, as one member of the pair raised its head and called while the other lifted its head a bit and moved it in coordination with the call. Many cranes, including sandhills, make a "unison call" which is a duet between paired birds. The unison call is thought to strengthen the pair bond and may also be used to defend territory. (Burnett County, Wisconsin.)
Habitat: Breeds in grasslands, marshes, and tundra; forages in fields in winter.