Calliphora vomitoria

Adults are 10–14 mm long, nearly twice the size of a housefly. The abdomen is bright metallic blue with black markings; the head and thorax are dull gray. Diagnostic features include long orange-yellow setae on the gena ("orange cheeks") below the eyes, and a dark basicosta at the wing base. The back of the head has long yellow-orange setae. The chest is bright purple with protective spikes. Eyes are red; wings are transparent. Distinguished from the closely related Calliphora vicina by the orange genal setae (C. vicina has pale setae) and dark basicosta (C. vicina has yellow basicosta).

Found in diverse environments including rural areas, riparian zones, and urban settings. Shows seasonal habitat shifts: predominantly in rural and riparian areas during winter and summer, with increased presence in riparian areas during spring and fall. Occurs at higher elevations relative to other Calliphoridae species such as Lucilia sericata and Chrysomya albiceps.

Widespread across multiple continents including Europe, North America (Alaska, Greenland, United States, southern Mexico), and southern Africa. Present on the Azores (Faial, Flores, Pico, São Jorge, São Miguel).

Most abundant during spring and summer; least abundant during fall and winter. Temperature significantly affects distribution and activity. Adults and pupae can hibernate during cold weather, with development resuming when temperatures rise.

Adults feed on nectar and function as pollinators. Larvae feed on decaying animal matter, including carrion, garbage, and feces. Larvae show enhanced growth on processed substrates (minced meats, cured products) compared to unprocessed raw tissue.

Complete metamorphosis with egg, larva, pupa, and adult stages. Eggs deposited on rotting corpses or decaying organic matter. Larvae hatch and feed immediately on decomposing tissue. After feeding, larvae crawl to drier substrates to pupate in brown cocoons. Development typically takes approximately 2 weeks; pupal stage is the longest developmental period. Adult lifespan averages 10–14 days. Under cold conditions, pupae and adults can enter hibernation.

Females deposit eggs at carrion sites, with oviposition rate increasing in response to high larval density through contact and chemical stimulation. Larvae feed in aggregations; group feeding enhances enzyme secretion effectiveness and generates heat. Adults rarely fly at night regardless of carrion presence, limiting nocturnal oviposition. Adults fly in groups to detect food sources; individuals release pheromones upon locating food to alert conspecifics. Executes complex inverted landings on ceilings using visual cues to time body rotation, employing pitch, roll, or combined maneuvers with front leg extension and cartwheeling of remaining legs.

Primary carrion decomposer and among the first colonizers of vertebrate remains. Dominates carcasses during bloated and active decay stages in spring and fall. Contributes to nutrient cycling through rapid tissue breakdown. Adults serve as pollinators for strongly scented flowers including skunk cabbage (Symplocarpus foetidus), American pawpaw (Asimina triloba), dead horse arum (Helicodiceros muscivorus), goldenrod, and carrot family species.

Critical forensic indicator for estimating time of colonization and post-mortem interval in temperate regions. Higher temperature threshold for development than many calliphorids, with development ceasing below approximately 2°C. Can cause myiasis in humans and animals. Used as live fishing bait; larvae sold commercially as maggots, pupae as casters. Subject of "Maggot Art" educational activities. Research on landing mechanics has informed bioinspired robotic drone design for inverted perching. Can transmit pathogenic bacteria such as Xanthomonas campestris pv. campestris to crops during pollination.

• Calliphora vicinaSimilar size and metallic coloration, but distinguished by pale genal setae versus orange in C. vomitoria, and yellow basicosta versus dark basicosta in C. vomitoria. C. vicina is a dietary generalist with equal growth on mixed substrates, while C. vomitoria is a processed substrate specialist.
• Lucilia sericataOverlapping carrion association and forensic importance, but smaller size, green metallic coloration, and lower elevation preference distinguish it from C. vomitoria.
• Chrysomya albicepsShares carrion habitat and higher elevation tolerance, but differs in morphology and geographic distribution patterns.
• Lucilia caesarShares carcasses with C. vomitoria in some cases, but differs in seasonal dominance and colonization timing.

• forensic entomology
• carrion ecology
• pollinator
• diptera
• calliphoridae
• blow fly
• maggot
• invasive potential
• medical entomology
• bioinspiration

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Maggot Art at UC Davis Picnic Day: Just Me and My Maggot | Bug Squad
• The Art of Maggot Art | Bug Squad
• Bohart Museum of Entomology Open House: Magnificent Maggot Art! | Bug Squad
• In the Blink of a Fly: Flies' Upside-Down Landings Inspire Robot Designs
• Fly using somersault pitch body maneuver - Entomology Today
• Scale Insects on Urban Trees Benefit Spiders, Other Natural Enemies in Plants Below
• The Eye Muscle of Calliphora Vomitoria L
• Distribution and functional significance of Leu-callatostatins in the blowfly Calliphora vomitoria
• Distribution and functional significance of Leu-callatostatins in the blowfly Calliphora vomitoria
• Cell death in the salivary glands of metamorphosing calliphora vomitoria