Aedes albopictus — That Bites!

Overview

Aedes albopictus is an invasive mosquito species known for daytime biting and its adaptability to urban container habitats.

It is also known as the tiger mosquito because of its black-and-white banding. It is important for public health; it has been linked to outbreaks of dengue and Zika in parts of Europe.

UK Relevance

The UK currently focuses on early detection and prevention of establishment. Public health risk remains low, but surveillance and reporting is prioritised for this species because it can spread quickly once established and can carry several pathogens.

UK surveillance first detected Ae. albopictus eggs in Kent in 2016, with further detections between 2017 and 2019. After several years without detection, eggs were detected again in August 2024 at a service area on the M20 in Kent. Follow-up surveillance did not find evidence of an established local population, but it is obvious that intorductions are still occurring, increasing the risk of establishemnt.

Identification

Look for a small black mosquito (about 7 to 8 mm) with one clear white line down the middle of the thorax.
Legs are banded with white scales (usually quite obvious), and wings are plain (not spotted).
It is often confused with native species such as Culiseta annulata and Aedes geniculatus, so clear photos are very helpful for confirmation.

Habitat and Season

This mosquito lays eggs in small water containers such as plant saucers, buckets, tyres, and neglected garden items. In the UK, that makes it a species of concern for ports, lorry parks, service stations, transport hubs, and other high-traffic entry points where mosquitoes may hitchhike in vehicles along transit and trade routes.

UKHSA's surveillance programme uses ovitraps (where the female lays their eggs) at these likely entry points, with intensified work in parts of South East England where climate models suggest conditions are becoming more suitable.

Diseases

Globally, Aedes albopictus is linked to transmission of dengue, chikungunya and Zika. In Europe, this species has already been implicated in local outbreaks, which is why UK surveillance treats incursions seriously even when overall UK risk remains low.

What to Look For

If you think you have seen an Asian tiger mosquito, take a clear photo, note the exact location, and include habitat details if you can (for example tyres, buckets, drains, or other water-holding containers).

You can report sightings through GOV.UK mosquito reporting guidance.

Asian Tiger Mosquito