Did you know that some spiders, East African jumping spiders, that is, don’t just have an appetite for meat, but for blood as well?
Their mouth parts aren’t equipped to suck the blood out of vertebrates like ourselves. They get their blood from mosquitoes that have already done the work for them.
They don’t just take their blood and run, though, they eat the mosquito too.
Experiments have shown that these spiders prefer blood-filled female mosquitoes to male mosquitoes, which don’t eat blood. If given the choice between female mosquitoes that have dined on blood to female mosquitoes forced to dine on sugar, a significant majority of the spiders chose the blood carriers again.