Pigeon parents feed their young “pigeon’s milk,” which is the sloughed-off lining of the crop, stimulated by the hormone prolactin. The nestling obtains this “milk” by poking its bill down the parent’s throat. In addition, they are monogamous birds, and between the time it takes between egg-laying and hatching (some 14 to 19 days), the female generally incubates the eggs by night, whereas the male incubates the eggs by day.
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