(C) Pigeons produce a substance known as 'crop milk' to feed their young ones. This substance is produced by the sloughing off of fluid-filled cells f

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(C) Pigeons produce a substance known as 'crop milk' to feed their young ones. This substance is produced by the sloughing off of fluid-filled cells from the lining of the crop. Both male and female pigeons possess this specialized structure called the crop,which is an expansion of the esophagus used for food storage and the production of crop milk.