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Female spiders have food on their minds almost all the time. They having mating as an objective part of the time. When they have mating on their minds that does not stop them from wanting to eat. Male spiders have several ways of identifying themselves as being of the same species as the female, so that she will let them approach to mate with her. Then most of them have their own ways of keeping the female from eating them as or after they mate. Some male spiders sacrifice themselves. Some female spiders sacrifice themselves to their babies after the babies hatch.

Eating the male spider after mating gives the male spider's genes a better chance of survival. So, evolutionarily speaking, it is an advantage to the male to have his progeny get a good start in life. The same is true of the female. Spiders species often live for only once season anyway, so it may be unlikely that either males or females of some species will get a second chance at reproducing.

So female spiders eat male spiders because they are hungry, but also perhaps because evolution has not found it expedient in some cases to give the males a good way out. In other cases, however, the males almost always are not eaten. Some female spiders even tolerate males to continue living with them.

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11y ago
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11y ago

so the male dosen't hurt the female

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Q: Why do female spiders kill male spiders?
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