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Bluebottle blow fly - Cynomya mortuorum
Bluebottle blow fly - Cynomya mortuorum

Bluebottle blow fly
The bluebottle blow fly (Cynomya mortuorum), also known as the fly of the dead, blue bottle or green bottle, belongs to the family of blowflies (Calliphoridae) in the order two-winged flies (Diptera), the suborder flies (Brachycera), the infraorder Muscomorpha (section: Schizophora; subsection: Calyptrata) and the superfamily Oestroidea. It belongs to the genus Cynomya in the subfamily Calliphorinae and the tribe Calliphorini. Scientific synonyms for Cynomya mortuorum are: Cynomya hirta, Musca mortuorum and Cynomya gregorpovolnyi. The bluebottle blow fly is widespread in Europe and Asia up to the Arctic Circle and prefers colder regions. This species is not regarded as endangered.
Cynomya mortuorum are the largest species of blowfly in Central Europe, reaching body lengths of 8-18 mm. Their bodies are dark blue to green in colour with a metallic sheen. Their compound eyes are bright red and their cheeks and face appear reddish-yellow in colour. The thorax (chest) is much darker than the abdomen and has several bright lines, which are usually difficult to discern.
Due to its appearance the bluebottle blow fly is unmistakable. This species is found in almost all habitats, and is common especially in forests, meadows, gardens and green spaces.
The bluebottle blow fly is active during the day from late April to September. While the males frequently sunbathe on walls or tree trunks, the females are avid flower visitors. The females can also be seen in feces and carrion. Their frequent presence in cadavers is of importance in forensic medicine.
Cynomya mortuorum feed on pollen and fluids, which they find in carrion or excrement. The fertilized females lay several hundred eggs (which are generally larger than those of other blowflies) on rotting meat. The whitish, cylindrical eggs are 1. 6-1. 75 mm in length and 0. 5-0. 7 mm in breadth and taper at the front, while the posterior end is blunt. The larvae hatch after 1-2 days and in the first stage of development reach body lengths of 1. 8-2. 2 mm. They feed on the dung, carrion or garbage, in which they live. In the 2nd larval stage, they are 2. 7-3. 8 mm long. At the end of the 3rd larval stage, the larvae are 13-14 mm in length and they then pupate. The pupae are 8. 4-9. 8 mm long and in size differ from pupae of other species of blow flies. The development time from egg to adult is approximately 38 days in total.

Cynomya mortuorum
Common namesBluebottle blow fly
German namesFriedhofsfliege, Totenfliege
Dutch namesLijkenvlieg
Finnish namesRaatokärpänen
AuthorCarl von Linné (Carl Nilsson Linnæus), 1761

North Europe (British Isles (United Kingdom (Great Britain (England (English Midlands (East Midlands (Leicestershire)))))), Germany, Scandinavia (Norway, Sweden, Denmark), Fennoscandia (Finland), Baltic region (Baltic States (Estonia)), Iceland), West Europe (Austria, France, Benelux (Belgium, Netherlands)), South Europe (Italy (North Italy, South Italy)), Central Europe (Czech Republic, Slovakia)
Far East (East Asia (Taiwan))
North America
USA (Alaska), Greenland

Ecozones: Nearctic

Distribution by Synonymus:
Musca vomitoria   Taiwan
Cynomya gregorpovolnyi   Czech Republic, Slovakia
Musca vomitoria   Type species, Genus, Calliphora
CountriesAustria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Iceland, Italy, Netherlands, Norway, Russia, Slovakia, Sweden, Taiwan, USA, United Kingdom
Links and ReferencesCynomya mortuorum in
Cynomya mortuorum in
Cynomya mortuorum in Wikipedia (English)

Description of images / photos
Photography with Cameras
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1. Bluebottle blow fly - Cynomya mortuorum
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Cynomya mortuorum
Bluebottle blow fly
AuthorLinnaeus, 1761
Cynomya gregorpovolnyi
Cynomya hirta
Cynomya vomitoria
Cynomyia mortuorum
Musca chrysocephala
Musca mortuorum
Musca vomitoria
Volucella mortuorum
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