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Caption: In female pigeons, the crop, a pocket-like organ used to store food, fills up with a white liquid resembling milk. Known as pigeons milk, this substance is fed to nestlings during the first 10 days of their lives and provides the nutrients required for their development.
Credit: Album / Universal Images Group
Image size: 3084 × 2262 px | 20.0 MB
Print size: 26.1 × 19.2 cm | 1214.2 × 890.6 in (300 dpi)