Bug FAQEastern Treehole Mosquito
Aedes triseriatus · Order: Diptera · Family: Culicidae
Source: Wikipedia
Females bite humans aggressively and can transmit La Crosse encephalitis and canine heartworm.
Source: Wikipedia
How to recognize it
It is called the eastern treehole mosquito because it prefers to breed in stagnant water found in tree holes.
Source: Wikipedia
Is it a pest in the house?
It breeds in natural containers like tree holes and in man-made water containers.
Source: Wikipedia
Does it bite or sting?
Female mosquitoes are aggressive human biters.
Source: Wikipedia
How to get rid of it
Removing standing water from backyards is a simple, cost-effective control method. Community involvement in source reduction helps prevent biting and disease transmission.
Source: Wikipedia
Where it lives
It lives in hardwood forests of the eastern United States and southern Canada.
Source: Wikipedia
What it eats
Both sexes feed on mammals, birds, reptiles, and amphibians. Only females take blood meals and they readily bite humans.
Source: Wikipedia
Life cycle
It undergoes a complete metamorphosis (holometabolous life cycle). Adult mosquitoes appear from July through September in the United States.
Source: Wikipedia
Where it is found in the US
Recorded in 37 of 51 states and DC. Most records: Iowa, Virginia, Illinois, Maryland, North Carolina, Florida, Indiana, Texas.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada; native in United States. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
How can I prevent eastern treehole mosquitoes?
Eliminate standing water in your yard and encourage neighbors to do the same.
Source: Wikipedia
When are they most active?
They feed mainly at dusk and dawn, though they may bite during the day in wooded areas.
Source: Wikipedia
What diseases can they transmit?
They can spread La Crosse encephalitis to people and canine heartworm to dogs.
Source: Wikipedia
Same family (Culicidae)
Asian Tiger MosquitoAedes albopictusCan spread germs or disease
House Mosquito ComplexCulex pipiensCan spread germs or disease
Yellow Fever MosquitoAedes aegyptiCan spread germs or disease
Inland Floodwater MosquitoAedes vexansCan spread germs or disease
Asian Bush MosquitoAedes japonicusCan bite
Southern House MosquitoCulex quinquefasciatusCan spread germs or diseaseSources
- Wikipedia: https://en.wikipedia.org/wiki/Aedes_triseriatus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-23.