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Contact: Suzanne Wu
University of Chicago Press Journals

Eider Duck Brood

Caption: Waterfowl are "careful, sophisticated bargainers," negotiating not only how much effort each puts into communal rearing of ducklings, but also profit-sharing, says a new study from the American Naturalist.

Credit: Courtesy Nils Sundberg

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Related news release: It takes a village -- female ducks negotiate joint rearing of ducklings

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