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Nature's 7 meanest mommies

By: Care2 .com on May 7, 2010, 3:58 p.m.

Photo: Susanne Nilsson/flickr

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One bit of advice to female house sparrows: Watch your backs, girls. Male sparrows, known for their randy polyamory, mate with a variety of females — and like any raging two-timed female, mommy house sparrows don’t take too kindly to it. Female house sparrows will often seek out the nest of another female that her partner has mated with, and will then proceed to kill that female’s young — removing the “competition” to ensure that the male spends as much time as possible helping to raise her babies instead. Ultimately she is doing right for her own offspring, but, so much for the step-daughters.