From a global prospective, the mosquito menace is still very real. More than a million people die every year from mosquito -borne malaria, and millions more are stricken. When you say you've been bitten by a mosquito, that's not quite accurate. You've been bitten by a female mosquito. Only the females bite.
Males feed on juices and nectar from flowers and fruit.
The females feed on plant juices and nectar too, but they also need blood in order to lay eggs. At certain levels of pitch, that sound is the female mosquito's mating call, which enables the males to easily locate the females even in darkness. Each female mosquito may lay eggs as many as 4-5 times during her short life span, but before each deposit, she needs a new supply of blood. The eggs hatch into larvae, worm-like organism that develop in water. So many larvae may hatch at once that they actually darken the water.