Male birds are often the larger, flashier sex that courts choosy females, who in turn raise their chicks. But not always. Female phalaropes -- like this Wilson's Phalarope -- challenge each other over territories in which to house a cluster of males half their size. And the males do all the childcare. Other stay-at-home dads include most of the ratites, like ostriches and emus, as well as several species of jacanas.

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