Fauna
Insect · GBIF taxon 1652274

Inland Floodwater Mosquito

Aedes vexans

Also known as Tomguito, Floodwater Mosquito

Inland floodwater mosquitoes hatch en masse following heavy rains when summer floodwaters submerge dormant eggs laid in low-lying soil. Known for their strong flying ability, adults travel miles from breeding grounds in search of host blood to nourish developing eggs. They serve as primary vectors for dog heartworm and several viral encephalitis strains across temperate regions.

Biting InsectCosmopolitanVector
Inland Floodwater Mosquito reference1 / 7
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—observations
—countries
—peak records
Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & prey
  • Mammal Blood
  • Plant Nectar
  • Fruit Juices
Predators
  • Bats
  • Dragonflies
  • Aquatic Beetle Larvae
ThreatsWidespread insecticide spraying, larval control agents, and wetland drainage
HabitatsFloodplains, temporary pools, wet meadows, and roadside ditches
Life spanAdults live 2–6 weeks; eggs remain viable in dry soil for years
Classification
  1. OrderDiptera
  2. FamilyCulicidae
  3. GenusAedes
  4. SpeciesAedes vexans
Range & activity
Range data is not available yet.
Safe observation
Interaction riskModerate
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is moderate
Transmits viruses and dog heartworm while causing itchy bites; use EPA-registered repellent near wet areas.
Why it is dangerous
Females transmit pathogens like West Nile virus and dog heartworm during blood meals, triggering itchy histamine reactions.
How to recognize a risky encounter
Recognizable by narrow white bands on the hind legs and a pale notch forming a B-shape on abdominal segments.
What to do
Avoid visiting brushy lowlands at dawn or dusk after rainstorms, and wear long sleeves treated with permethrin.
Responsible observation
  • Pest Protection: Apply insect repellent containing DEET, picaridin, or oil of lemon eucalyptus before entering damp woods.
  • Yard Management: Drain standing water in gutters, buckets, and birdbaths weekly to interrupt breeding.
  • Identification: Look closely at hind legs to spot distinct narrow white rings at the joints.
Related species
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Found in Collections

Ecosystem chain

Wetland Territory

Inland Floodwater Mosquito is found in this collection. Identify it in Fauna to fill this slot and continue your progress.

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