Life stages of Culex species mosquitoes
Eggs • Adult, female mosquitoes lay eggs on the surface of fresh or stagnant water. Water sources can include barrels, horse troughs, ornamental ponds, unmaintained swimming pools, puddles, creeks, ditches, and marshy areas. • A female Culex mosquito lays eggs one at a time. Eggs stick together to form a raft of 100 to 300 eggs. The raft floats on the water.
Larva • Larvae hatch from mosquito eggs and live in water. • Larvae can be seen in the water. They are very active and are often called “wigglers.” • They feed on materials found in the water. • Larvae shed their skin (molt) several times during this stage.
Pupa • Pupae live in water. Pupae do not have external mouthparts and do not feed during this stage. • An adult mosquito emerges from a pupa and flies away.
Adult • Adult female mosquitoes bite people and animals. Mosquitoes need blood to produce eggs. • After blood feeding, female mosquitoes look for water sources to lay eggs. Several days pass between feeding and looking for a place to lay eggs. • Culex mosquitoes don’t fly long distances, but have been known to fly up to 2 miles (3.2 km). • Some Culex mosquitoes prefer to live near and bite birds. They bite people when other animals are not nearby. • Because Culex bite animals and people, they live outdoors or near homes.
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