Culex restuans
Culex restuans is widespread throughout New Jersey and often appears earlier in the season than homeowners expect. It can use an exceptionally broad range of stagnant-water habitats.
An early, adaptable Culex that overlaps the house mosquito.
Rutgers describes Culex restuans as common in every New Jersey county, with larvae from early spring through late fall and habitats ranging from nearly clear container water to highly polluted ground pools.
The image shown is genus-level Culex. Exact pipiens/restuans separation is a technical identification problem.
Statewide distribution
Rutgers describes Culex restuans as widespread and common in every county in New Jersey.
Seasonality
Overwintered females emerge and begin laying egg rafts in spring. Rutgers reports populations often peaking by July with another fall peak possible.
Habitat flexibility
Temporary ground pools, grassy swamp edges, bogs, roadside ditches, tire ruts, buckets, tires, catch basins, sewage effluent and septic seepage are all documented habitats.
Containers can be deceptively clean
Rutgers notes it can be the first species to colonize discarded-tire water and may occur in water that looks surprisingly clear.
Identification limits
Culex restuans and Culex pipiens overlap in habitat and appearance. Larval and adult characters used by specialists are more reliable than homeowner color impressions.
Yard takeaway
Any stagnant water deserves attention even if it does not look dirty. Organic debris, shade and repeated refilling can turn a modest container into persistent Culex habitat.
Culex pipiens
Both are common in human environments and can share breeding sites. Season, habitat and laboratory/morphological identification are more useful than a quick adult photo.
Identification questions
Is Culex restuans found throughout NJ?
Rutgers describes it as common in every county.
Does it need filthy water?
No. Rutgers documents larvae from nearly clear water through grossly polluted conditions.
Can it overwinter?
Rutgers describes inseminated females overwintering in sheltered, humid structures and subterranean spaces.
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