Add Yahoo as a preferred source to see more of our stories on Google. The image shows a bird with a brood patch, a featherless area on its abdomen used to transfer heat to eggs or chicks. The bird is ...
The image shows a bird with a brood patch, a featherless area on its abdomen used to transfer heat to eggs or chicks. The bird is gently held, with ruffled feathers around the patch.© ...
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