South American spider females pick their mates according to how well the nuptial gift is wrapped. It’s not only what’s inside the nuptial gift that a potential suitor brings to a female Paratrechalea ornata spider that counts. It’s the whole package, white silk wrappings and all, that can give one male spider the edge over another ...
http://www.sciencedaily.com/releases/2014/02/140203084020.ht
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