Aedes albopictus

(Skuse, 1894)

Asian tiger mosquito, forest mosquito, tiger mosquito

Aedes albopictus, the Asian tiger mosquito, is a highly to tropical and subtropical Southeast Asia. It has spread globally through human commerce, particularly via used tires and shipping containers. The species is distinguished by striking black and banded legs and a white thoracic stripe. It is a significant public health threat as an efficient vector for , , Zika, and other . Unlike many mosquitoes, it bites during daytime hours and thrives in urban environments, breeding in small artificial water containers.

Aedes albopictus by (c) haileyleroy2003, some rights reserved (CC BY), uploaded by haileyleroy2003. Used under a CC-BY license.

Aedes (Stegomyia) albopictus by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Aedes albopictus: //ˈiːdiːz ˌælboʊˈpɪktəs//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The single thoracic stripe is the most reliable field character, separating Ae. albopictus from similar lacking this continuous marking. In North America, Ochlerotatus canadensis shares banded legs but lacks dorsal thoracic markings. In Europe, Culiseta annulata has banded legs but is larger, beige-grey rather than black and white, and lacks the thoracic stripe. Aedes cretinus (eastern Mediterranean) has a white scute stripe that ends before the and has two additional stripes. Aedes aegypti ( mosquito) is morphologically similar but has a lyre-shaped pattern on the rather than a single straight . Microscopic examination of patterns on the and may be required for definitive identification in areas of sympatry.

Images

Appearance

are small mosquitoes, typically less than 10 mm in length, with a distinctive black and color pattern. The most prominent feature is a single silvery-white of tight running from between the down the midline of the —this is the most reliable identification character. Legs display conspicuous white on I–IV, with the hind leg tarsomere V completely white. The has dark with triangular silvery-white markings on II–VI. are transparent with white spots at the base of the . Males are approximately 20% smaller than females and have bushier with more prominent auditory receptors; their exceed the length, unlike in females.

Habitat

In its range, occupies tropical and subtropical forests. In invaded regions, strongly associated with human-modified environments: urban and suburban areas, parks, cemeteries, and residential neighborhoods. Breeds in small, often temporary water bodies—natural tree holes and bamboo internodes, but predominantly artificial containers: discarded tires, cans, plastic containers, gutters, flower pots, bird baths, and rain-filled trash. Prefers shaded locations with vegetation. Can utilize water volumes as small as 30 ml. Tolerates running water better than many Aedes .

Distribution

to tropical and subtropical Southeast Asia. Established throughout much of the world through human-mediated : widespread in the United States (eastern seaboard, Gulf Coast, Midwest, and expanding westward), southern Europe (Italy, France, Spain, Greece, Balkans), Mediterranean region, Middle East, Latin America (Brazil, Argentina, Mexico, Caribbean), Africa (South Africa, Nigeria, Cameroon, Gabon), and the Pacific. In the United States, present in at least 40 states and 1,368 counties as of 2017. Range continues expanding northward with climate warming.

Seasonality

In tropical and subtropical range, active year-round. In temperate invaded regions, active primarily during warmer months (spring through fall), with in protected microhabitats. can survive freezing temperatures and snow cover; temperate strains show greater than tropical . Peak biting activity varies regionally but generally occurs during daylight hours with peaks in early morning and late afternoon.

Diet

Females are blood-feeding (), requiring blood meals for development. Both sexes feed on nectar and sugars. Females are feeders, biting humans, other mammals, and birds. Multiple blood meals from different may be taken during a single gonotrophic cycle, enhancing potential for zoonotic .

Host Associations

Humans - primary blood and biting targetStrongly in urban environments
Domestic and wild mammals - blood Includes dogs, cats, and various wildlife
Birds - blood Contributes to bridge potential for
Wolbachia - endosymbiontNatural with wAlbB and other strains; affects and potentially transmission

Life Cycle

: → → → . Eggs are laid singly on moist surfaces just above water , not directly in water; they hatch upon flooding. Larvae develop in aquatic , passing through four . Development rate depends on temperature and food availability. Adults emerge from pupae in 2–3 days under optimal conditions. Short range (<200 m lifetime), so breeding sites are typically near biting locations. time can be as short as 7–10 days in warm conditions.

Behavior

biting activity with peaks in morning and late afternoon; bites during full daylight unlike many mosquito . Rapid, agile makes it difficult to swat. Weak flier with limited range. Strongly associated with human dwellings, resting outdoors in shaded vegetation rather than indoors. Exhibits

Ecological Role

competitor that can displace mosquito through larval competition and satyrization (interspecific mating interference). Serves as bridge between zoonotic and humans due to feeding habits. Natural influences through . for various including , , and predatory aquatic , though efficacy remains limited.

Human Relevance

Major public health pest and . Transmits virus, virus, Zika virus, virus, and West Nile virus to humans; also vectors Dirofilaria immitis (dog ). Responsible for chikungunya in Italy (2007) and La Réunion (2005–2006). Nuisance biting during daytime hours affects outdoor recreation and work. Difficult to control due to cryptic breeding sites in residential areas. Subject to intensive surveillance and integrated vector management programs. Genetic and methods under development including -based suppression and sterile male techniques.

Similar Taxa

Aedes aegyptiOverlapping range and importance; distinguished by lyre-shaped scutal pattern versus single straight stripe, and more strictly urban/domestic preference
Aedes cretinus in eastern Mediterranean; distinguished by scute stripe ending before and two additional stripes
Culiseta annulataEuropean with banded legs but larger size, beige-grey coloration, and lack of thoracic stripe
Aedes pseudalbopictusSoutheast Asian morphologically similar; molecular differentiation often required

More Details

Invasion biology

Listed among the 100 world's worst . Spread primarily through international trade in used tires and lucky bamboo. Can establish from very small founder numbers due to parthenogenetic-like reproductive strategies and desiccation .

Satyrization

Interspecific mating with Aedes aegypti produces no offspring but sterilizes Ae. aegypti females, contributing to . Ae. albopictus females can remate after such encounters, suffering no reproductive cost.

Insecticide resistance

show increasing to , with kdr mutations (F1534C/S) documented. symbiotic bacteria (Bacillus cereus) may enhance deltamethrin resistance.