• Genus: Calliphora (“bearer of beauty) and Lucilia (“little light”)
• Key diagnostic traits:
• Bottle flies are a subgroup of Blow flies
• Metallic, iridescent coloration
• Plumose arista (feathered antenna bristle)
• Large, red compound eyes

Identification:

Blow and Bottle flies are medium to large (8-14 mm). Thorax and abdomen present as an iridescent metallic coloration. Adult females are oviparous, placing eggs in decomposing tissue, where larvae emerge and feed. With a wingspan of 18-20 mm, flight speeds are 7 to 11 km/h or 4.3 to 6.8 mph (brief bursts >13 km/h or 8 mph), enabling efficient sensory detection and fast, direct flight paths. Flight is loud and direct as these species are often among the first in the order of succession to arrive at the postmortem interval.

Habitat & behavior:

• Indoors: attracted to dead rodents, meat waste, pet food, trash chutes, and trash receptacles.
• Found in and around dumpsters, decaying meat, carrion, compost piles, animal feces, and wounds.
• Active during warm daylight hours (diurnal).
• Indoors, linger around windows, trash bins, dead animals, pet food, and organic waste.
• Strong olfactory response (sense of smell) to sulfur-rich odors like dimethyl disulfide (DMDS).
• DMDS is a volatile organic compound (VOC) that is released during the decomposition of carrion (dead animal flesh).
• Prefer protein-rich substrates (organic decay materials) over sugars.
• Adult flies bask on warm surfaces near resource substrates.

Public health significance:

Blow and Bottle flies are medically significant in public health as well as forensic entomology. These species may cause facultative myiasis in animals and humans, particularly in neglected wounds or pressure ulcers (decubitus ulcers).

Blow and Bottle flies are vectors of pathogens including Salmonella, E. coli, and Clostridium. As forensically significant fly species Blow and Bottle flies are key indicators in estimating the postmortem interval (PMI) by appearing at remains in predictable developmental stages.

Common forensic acronyms include:

• PMI (Postmortem Interval): Time elapsed since death
• TOA (Time of Arrival): When insects first arrive at remains
• TOD (Time of Death): Estimated time a person has died

Lifecycle (Holometabolous or “whole change”)

• Reproduction: Primarily oviparous (place eggs), some facultatively larviparous (birth live maggots)
• Development: Egg (resource sites), larva (moist), pupa (dry), adult (free-ranging)
• Egg to adult in 7-12 days depending upon temperature and humidity
• Females highly fecund, placing hundreds of eggs in batches
• Feeds upon decomposing tissue, feces, and fermenting organic matter

Quick facts:

Environmental role:

Blow and Bottle flies are primary decomposers, helping recycle nutrients by breaking down decaying organic matter. These species are used as a bioindicator (species that signal ecosystem health) during ecological monitoring of decay stages.