Lucilia sericata

(Meigen, 1826)

common green bottle fly, green bottle fly, blow fly

Lucilia sericata is a in Calliphoridae, widely distributed across most temperate regions worldwide. display brilliant metallic blue-green or golden coloration and are frequently among the first insects to arrive at carrion. The has significant forensic importance due to predictable developmental rates used to estimate postmortem intervals. Larvae are also employed in maggot debridement therapy for cleaning necrotic wounds. The species exhibits temperature-driven seasonal activity, preferring warmer summer months.

Lucilia sericata by (c) Steve Kerr, some rights reserved (CC BY), uploaded by Steve Kerr. Used under a CC-BY license.

Pronunciation

How to pronounce Lucilia sericata: /luˈkɪliə ˌsɛrɪˈkɑːtə/

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

Identification

Distinguished from other blow flies by combination of metallic blue-green coloration, three thoracic cross-grooves, and short sparse black setae. Differs from Lucilia cuprina (bronze bottle fly) in coloration intensity and geographic distribution. Separated from Phormia regina (black blow fly) by coloration and seasonal activity pattern. Distinguished from Chrysomya rufifacies (hairy maggot blow fly) by lack of body hair on larvae and different oviposition timing.

Images

Habitat

Associated with decomposing organic matter including carrion, garbage, and . Found in urban, suburban, and rural environments where such resources occur. Larvae develop within necrotic tissue of vertebrate remains or wounds.

Distribution

Temperate zones of the Northern Hemisphere; introduced worldwide through human commerce. Established in North America, Europe, Asia, and other regions. Records from Azores (Faial, Flores, Graciosa, Pico, São Jorge).

Seasonality

Active during warmer months; peak activity in summer. Development rate temperature-dependent, with faster development at higher temperatures within thermal range. In temperate regions, present spring through fall with reduced winter activity.

Diet

feed on nectar and other sugar sources. Larvae are necrophagous, feeding on decomposing vertebrate tissue. In therapeutic contexts, larvae consume necrotic wound tissue while sparing healthy tissue.

Host Associations

Humans - wound myiasis agent; forensic indicator; therapeutic agent (maggot debridement therapy)Larvae infest necrotic wounds; case documented in diabetic patient with foot gas gangrene
Vertebrate carrion - larval development substratePrimary resource for and offspring development
Sheep and other mammals - potential myiasis agentRelated Lucilia cuprina causes significant economic damage to sheep in Australia

Life Cycle

Holometabolous. Females oviposit clusters of in natural orifices or wounds of carrion. Eggs hatch to first instar larvae, which twice through second and third instars. Third instar larvae migrate to dry substrate to pupate; pupae immobile and oval, often mistaken for rodent droppings. follows pupal development. Development from egg to adult temperature-dependent; at 27°C completes faster than Phormia regina but slower than Cochliomyia macellaria.

Behavior

arrive rapidly at carrion, often within minutes of death, to evaluate suitability for oviposition using sponging . Oviposition occurs immediately upon finding suitable substrate, avoiding competitive delay seen in Phormia regina. Larvae aggregate and generate heat, altering local microclimate temperature. Larvae exhibit self-propelling movement detectable by ultrasound imaging. Pupae remain immobile until adult .

Ecological Role

Primary decomposer of vertebrate remains; initiates carrion decomposition and nutrient cycling. Facilitates breakdown of organic matter through larval feeding activity. Serves as food source for predatory beetles and other insects. Successional role in carrion , typically arriving before later-colonizing .

Human Relevance

Critical forensic indicator for estimating postmortem interval based on predictable developmental rates and arrival timing. Employed in maggot debridement therapy for cleaning necrotic wounds and promoting healing; FDA-approved medical device. Can cause facultative myiasis in necrotic human tissue. Introduced to new regions through human commerce.

Similar Taxa

Phormia reginaBlack blow fly with delayed oviposition ; darker coloration; prefers spring and fall seasons with limited temporal overlap
Chrysomya rufifaciesHairy maggot blow fly with predatory larval ; larvae consume other maggot ; summer-active with expanding range due to climate warming
Lucilia cuprinaBronze bottle fly with similar ; distinguished by coloration intensity; major sheep pest in Australia with different relationships

More Details

Forensic Methodology

Developmental timing used to calculate time of , which estimates minimum postmortem interval. depends on temperature data, local variation, and absence of confounding factors such as myiasis or interference.

Therapeutic Application

Larvae secrete proteolytic and antimicrobial compounds that liquefy and disinfect necrotic tissue while stimulating wound healing. Self-limiting; larvae exit wound when necrotic tissue depleted.

Climate Sensitivity

Warming temperatures may alter competitive relationships with other blow flies, potentially increasing overlap with Phormia regina and affecting forensic interpretation.