crop milk
A semi-solid substance, somewhat like pale yellow cottage cheese, secreted from the lining of the crop of (both male and female) pigeons and doves that is fed to their young (squabs) through regurgitation. An analog to crop milk is also secreted from the esophagus of flamingos and some penguins.
A street performer who poses like a statue, usually with realistic statue-like makeup, sometimes for hours at a time.
Any sea urchin of the superorder Echinacea.
The doctrines and rites of the Ophites.
両親のハトは、孵化後最初の1週間、嗉嚢の内膜から分泌される淡黄色でカッテージチーズ状の半固形物（嗉嚢乳）を吐き戻して子鳩に与えます。
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