Do all mosquitoes bite?

No. Only the females bite. Female mosquitoes require the protein of a blood meal for development of their eggs – they do not feed on blood for their own nourishment. Since blood is only required to build eggs, the males do not take blood, but rather feed on plant nectar.

Females may feed one to three times to obtain a full blood meal. The speed of digestion of the blood-meal may take 2-3 days in tropical areas, and then the female is ready to lay her eggs. After laying the eggs, the female mosquito may take on another blood-meal and repeat the process, thus feeding several times during her lifetime.