Is it true that all female spiders eat the males after mating?

No, this is not true. Some female spiders do not eat their mates, however some species will eat the male, if they are smaller or food is scarce.

“We were surprised to find that such a simple characteristic such as how small males are relative to females has such a large effect on the frequency of sexual cannibalism,” Wilder said.

Perhaps the most well-known example of spider-women eating spider-men is the black widow. But even that cannibalism case is overstated. For most of the many species of black widows, cannibalism is the exception, not the rule, according to Rod Crawford of the Burke Museum of Natural History & Culture at the University of Washington.


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