Psorophora ciliata

(Fabricius, 1794)

Gallinipper, Shaggy-legged Gallinipper

Psorophora ciliata is a notably large mosquito to eastern North America, recognized for its aggressive biting and intimidating size. are active during spring and summer, with females feeding on large mammals including humans. The species has earned like "" and "shaggy-legged gallinipper" due to its appearance and persistent biting. are obligate of other mosquito larvae and small aquatic organisms. The species has been expanding its range northward into New England in recent years.

Psorophora ciliata larva by Brigid Berger. Used under a CC BY 4.0 license.

Psorophora ciliata P1650285a by
xpda. Used under a CC BY-SA 4.0 license.

Psorophora ciliata P1420524a by
xpda. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Psorophora ciliata: /sɔˈrɔfɔra sɪˈliːata/

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

Identification

Most reliably distinguished from other Psorophora by the combination of large size (7–9 mm wingspan), and dark thoracic pattern with central yellow stripe and two dark stripes, and especially the banded "shaggy" legs. The yellow with black tip and pale with paler tip are additional supporting characters. Similar species include other Psorophora species, but P. ciliata's leg banding and large size are distinctive.

Images

Appearance

Relatively large mosquito with wingspan of 7–9 mm. Both sexes are large and -colored. is yellow with black tip. is pale with paler tip. is dark with thin, bright yellow stripe down the middle, flanked by two dark stripes on each side. Legs are distinctly banded and "shaggy" in appearance. Males have bushy () ; females have non-bushy antennae.

Habitat

Woodlands, fields, and floodplain areas. Breeds in ephemeral pools and moist soil areas that flood after rainfall. occur in shallow aquatic including irrigation ditches and temporary pools, often co-occurring with other floodplain mosquito .

Distribution

Eastern North America from South Dakota and Quebec south to Florida, extending through Central America to South America in tropical and temperate zones. Recently documented expanding northward into New England (Massachusetts), where it was first recorded in Norfolk County in 2020.

Seasonality

most active during spring and summer. Activity occurs during both day and night. In floodplain , abundance peaks following heavy rainfall and flooding events.

Diet

females feed on blood of large mammals, including humans. Adult males and females both feed on flower nectar. are obligate , feeding on larvae of other mosquito (including Aedes aegypti, Aedes vexans, Psorophora columbiae) and small aquatic organisms including tadpoles.

Life Cycle

laid singly on moist soil or as rafts on ephemeral pools. Eggs can withstand dry conditions and hatch when flooded. Aquatic larval stage includes multiple ; are predatory throughout development. occurs in water. emerge from . Lifespan may extend up to two years from birth under favorable conditions.

Behavior

Females are aggressive biters, persistently pursuing . are active using a rapid mechanism: generating abdominal hemostatic pressure to propel the toward , fanning palatal brushes into basket-like arrangements, and simultaneously opening sharp-toothed . This predatory shows convergence with Toxorhynchites amboinensis.

Ecological Role

Larval that may regulate of other mosquito in aquatic , potentially reducing overcrowding effects. females serve as blood-feeders on large mammals. Both sexes contribute to through nectar feeding. Serves as for birds, fish, and predatory .

Human Relevance

Significant nuisance pest due to aggressive biting and large size, which produces a painful bite. Historical accounts from the Civil War era document referring to mosquitoes as "." Expanding range in the northeastern United States may increase encounters. Capable of transmission, though specific for human is not well documented in provided sources.

Similar Taxa

Psorophora feroxBoth are large, aggressive Psorophora found in floodplain and expanding in the northeastern United States; P. ciliata is larger with more distinctive leg banding
Psorophora columbiaeCo-occurs in larval ; P. ciliata distinguished by larger size and thoracic pattern
Aedes vexansShares floodplain breeding and aggressive biting ; P. ciliata is substantially larger with different coloration and leg structure

More Details

Predatory larval morphology

possess curved palatal brushes and heavily-toothed as functional for , documented through high-speed microcinematography.

Range expansion

First recorded in Norfolk County, Massachusetts in 2020, with increasing numbers in 2021, representing northward range expansion potentially linked to climate change and extreme weather events.