Calliphoridae

Key diagnostic characters include: plumose aristae covering the entire length of the third antennal segment; two notopleural bristles (one in related families); hindmost posthumeral bristle positioned lateral to the presutural bristle; presence of bristles on the meron; branched R2+3 wing veins; frontal sutures present; well-developed calypters. The combination of metallic coloration with these bristle arrangements distinguishes Calliphoridae from similar families such as Sarcophagidae (flesh flies, typically gray with thoracic stripes) and Muscidae (house flies and relatives, generally dull colored with different bristle patterns).

Temperate to tropical regions worldwide. Larval habitats include carrion, dung, decaying organic matter, and necrotic wounds. Some species are adapted to urban environments. Cluster flies in the genus Pollenia parasitize earthworms in soil. Typical habitats provide loose, damp soil and litter where larvae can thrive and pupate. Adult flies frequent flowers, carrion, and sun-warmed surfaces on buildings.

Worldwide distribution across all continents except Antarctica. Highest diversity in tropical and subtropical regions. Approximately 120 species in the Neotropics; large numbers in Africa and Southern Europe. Some species have been introduced globally through human commerce, including Lucilia cuprina (Australian sheep blow fly) and Lucilia sericata (common green bottle fly).

Activity patterns vary by species and latitude. Phormia regina is primarily spring and fall active, avoiding temperature extremes. Lucilia sericata prefers warmer summer months. Chrysomya rufifacies is a summer-active species in temperate regions. Calliphora vicina remains active during cooler periods and is often the dominant winter species in temperate zones. Cluster flies (Pollenia) seek shelter in buildings during autumn and winter, becoming active on warm winter days.

Larvae of most species are necrophagous, developing in carrion, dung, and decaying animal matter. Some species are coprophagous. Protocalliphora larvae feed on blood of nestling birds. Trypocalliphora larvae consume host tissues causing myiasis. Adults feed on nectar, honeydew, and liquid exudates from carrion and dung; they possess sponging-sucking mouthparts and cannot consume solid food.

• carrion - larval development substrateprimary habitat for most species
• dung - larval development substratecommon for many species
• earthworms - hostPollenia species are parasitoids or predators
• nestling birds - hostProtocalliphora and Trypocalliphora cause myiasis
• livestock - hostmyiasis in sheep, cattle, and other animals
• humans - occasional hostwound myiasis and accidental infestation

Most species are oviparous; females deposit 150–200 eggs per batch, totaling around 2,000 eggs over their lifetime. Eggs are yellowish or white, approximately 1.5 × 0.4 mm, resembling rice grains. Hatching occurs within 8–24 hours. Larvae pass through three instars, separable by examination of posterior spiracles. Third instar larvae leave the food source to pupate in soil. Pupation lasts 7–14 days; total development from egg to adult ranges from 6–11 days at 20°C in Phormia regina, though highly temperature-dependent. Some species associated with parasitism have evolved viviparity or ovoviviparity.

Adults are strong fliers capable of detecting carrion odors from up to 1.6 km distant. Females arrive rapidly at carcasses to oviposit, often within minutes of death. Larvae use proteolytic enzymes and mechanical mouth hooks to liquefy and consume tissue. Chrysomya rufifacies larvae are facultatively predatory, consuming other maggot species when carrion resources are limited. Adults exhibit basking behavior on sun-warmed surfaces. Cluster flies seek overwintering shelter in building crevices and wall voids.

Primary decomposers and nutrient recyclers in terrestrial ecosystems. Accelerate carrion decomposition through larval feeding activity. Serve as food for predators including spiders, beetles, frogs, and birds. Adults contribute to pollination of certain flowering plants, particularly those with strong odors. Some species act as pathogen vectors. In forensic contexts, species succession patterns on carrion provide critical evidence for estimating post-mortem intervals.

Forensic entomology: species identification and developmental stage analysis used to estimate minimum post-mortem intervals in death investigations. Maggot debridement therapy: sterile Lucilia sericata larvae used to clean necrotic wounds, selectively consuming dead tissue while secreting antimicrobial compounds. Veterinary pest: Lucilia cuprina causes flystrike (myiasis) in sheep, costing Australian industry approximately AU$170 million annually. Historical eradication: Cochliomyia hominivorax (primary screwworm) eliminated from United States, Mexico, and Central America through sterile male release programs. Disease transmission: adults can vector pathogens including Salmonella, dysentery agents, and Mycobacterium avium paratuberculosis. Nuisance pest: cluster flies (Pollenia) overwinter in buildings. Fishing bait: larvae known as 'gentles' are commercially collected.

• SarcophagidaeFlesh flies share carrion association and similar size; distinguished by gray thorax with three dark longitudinal stripes, checkerboard abdominal pattern, and different bristle arrangements including only one notopleural bristle
• MuscidaeHouse flies and relatives overlap in size and some habitats; distinguished by dull coloration, non-plumose or short-plumose aristae, and absence of metallic sheen
• OestridaeBot flies cause myiasis but are obligate parasites with highly modified adults lacking functional mouthparts; larvae develop in living hosts rather than carrion

• forensic entomology
• myiasis
• carrion ecology
• maggot therapy
• decomposition
• diptera
• metallic flies

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Bohart Museum Features UC Davis Forensic Entomologist Bob Kimsey | Bug Squad
• They eat dead things, Part II - Blow flies, Calliphoridae — Bug of the Week
• Carp diem: Fish and blow flies, Calliphoridae — Bug of the Week
• Calliphoridae | Beetles In The Bush
• How Blow Flies Compete (or Not) for Decomposition Duties
• Bug Eric: Fly Day Friday: Cluster Flies
• CALLIPHORIDAE (REVIEW)
• Molecular identification of Calliphoridae (Diptera: Calliphoridae) of forensic importance in Colombia
• FAMILIES CALLIPHORIDAE AND MESEMBRINELLIDAE
• Reproductive behavioral strategies of necrophagous Calliphoridae
• Survey of Forensically Important Calliphoridae in Samsun Samsunda Adli Açıdan Önemli Olan Calliphoridae Hakkında Araştırma
• Diptera in the Forensic Investigation of Human Deaths in Great Britain and the Dominant Role of Calliphora vicina (Calliphoridae) in Estimating a Minimum Post-Mortem Interval.
• Edge Effect and the Influence of Biotic and Abiotic Factors on Calliphoridae and Mesembrinellidae (Insecta: Diptera) in Três Picos State Park, Brazil.