Blue Blowfly

Fascinating facts about the Blue Blowfly

• A female blue bottle fly can deposit as many as 300 eggs on fresh carrion or open wounds, providing the first step in its rapid development. The eggs hatch into first-instar larvae within about 24 hours, which then pass through a second instar in roughly 20 hours and a third in 48 hours. Under favourable conditions those larvae feed for three to four days before leaving the corpse to seek a suitable site for pupation.
• When the temperature reaches the species' threshold of 27 °C, the entire life cycle from egg to adult is completed in about 18 days, allowing the population to turn over quickly. The pupal stage alone occupies roughly 11 days of that period, after which the adult emerges ready to reproduce. Because each cycle is so short, up to five generations can be produced in a single year if temperatures remain at the threshold level.
• In the forensic succession on a corpse, adult C. vicina typically appear two days after death, providing a reliable marker for estimating the post-mortem interval. Their presence is especially notable in cooler periods because they have a lower flight-activity threshold than many other blow-flies, allowing them to colonise bodies when temperatures are only 13-16 °C. This timing must be added to maggot-age calculations to avoid under-estimating the interval.
• Calliphora vicina is adapted to cooler weather, so it is most common in winter when temperatures are only 13-16 °C. This lower flight-activity threshold lets it become active earlier than many other blow-flies, arriving on a corpse about two days after death. Because it colonises bodies during the colder months, its presence provides a reliable marker for estimating post-mortem intervals in winter cases.
• The blue bottle fly can be told apart from its close relative C. vomitoria by the bright orange colour of its cheeks, a distinctive feature noted in identification keys. Its body is metallic blue-gray on the thorax and abdomen and measures about 10-11 mm in length. Additional colour cues include yellow or orange sclerites at the base of the coxa and black bristles on the meron with two to three bristles on the notopleuron.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Blue Blowfly

In a whirl of iridescent blue, the blue blowfly dances through the air, its delicate wings beating at a hypnotic pace as it navigates the intricate landscape of decay and rebirth. With an unerring instinct, it homes in on the sweet scent of rotting matter, its compound eyes drinking in the vibrant hues of its surroundings as it moves with an effortless, weightless grace. As it alights upon a bloated carcass, its proboscis unfurls like a slender thread, sipping the rich broth of life that sustains it in this eternal cycle of transformation.

More insects and spiders to discover

Browse Feravox