File:Malards with too many chicks.JPG

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English: It is common for water fowl, such as these Mallards, to accept extra ducklings into their brood. But don't get sentimental over the adoptions. The behaviour is linked to a phenomenon known as the "dilution" effect. Among ducks, the extra offspring cost the parents very little extra effort. By hiding their own offspring among a larger brood, they decrease the chances of one of their own offspring being eaten. The adoptive chicks also benefit from this same dilution. Everyone wins.
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Author M. Readey

Photo taken in Minot North Dakota, USA.

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current04:30, 28 January 2012Thumbnail for version as of 04:30, 28 January 20122,560 × 1,920 (1.11 MB)Circa24 (talk | contribs)

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