The larvae feed on microorganisms found in the water and grow rapidly, eventually passing through four molts. After the fourth molt has taken place the mature larvae transform into pupae. After a few days the pupae transform into adults. The adult male mosquito feeds only on nectar and plant juices whereas, the females are blood feeders and generally require a blood meal before they can lay eggs. Several different species of mosquitoes feed on humans.
Mosquitoes also feed on most mammals and birds and some feed on reptiles and amphibians.
The feeding habits of female mosquitoes are not only annoying, but in some cases can result in the transmission of disease. Birds are important natural hosts for these viruses, which are transmitted to man through the bite of an infected mosquito. Small mammals such as rabbits, squirrels and chipmunks may harbor other forms of viral encephalitides which can also be transmitted to humans. Symptoms of viral encephalitis in humans range from mild to severe and may include high fever, convulsions and delirium. Homeowners can further reduce their chances of infection by eliminating breeding sites for mosquitoes on their own property.