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要論忠誠，美洲鴕肯定不是，因為它們沒有固定的配偶。正因如此，雄鳥要獨自承擔起孵卵、喂食、照顧和保護后代的重任。

 Rheas are large South American birds similar to ostriches . Father rhea takes sole care of his young. From eggs to chicks, he feeds, defends, and protects them until they are old enough to survive on their own.

（圖片源于互聯網 英語點津陳蓓編輯）

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