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Operation Migration staff wore this hood and googles, along with a white smock, as a disguise so that the birds wouldn’t imprint on humans. Staff forbade talking near the cranes for the same reason. Biologists gave numbers—but not names—to each new hatchling to remind people that the birds were not pets. Staff also wore hand puppets to keep crane chicks from imprinting on humans. This made it easier for the birds to bond with, and follow, the ultralight. Image courtesy of the Smithsonian Institution.
