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STOMPer Jia Ling was amused to find this pair of houseflies going at it on her boyfriend's car. She says:
"I found a pair of flies making out on top my boyfriend's car.
"They were too engrossed and were not bothered that there was a camera placed near them when I was taking these shots.
"Hope it will be of some entertainment value."
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These are flesh flies (F. Sarcophagidae), and as the name suggests, are attracted to carrion. Some species are also known to lay their eggs in open wounds.
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(Photo by Chay Hoon)
While browsing through Flickr, I'm coming across a rather interesting pattern where it comes to photos of flesh flies:
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(Photo by Nadine V.)
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(Photo by jackb74105)
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(Photo by Ajay H)
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(Photo by radio4)
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(Photo by jaiprox)
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(Photo by Marcus)
Along with the blow flies (F. Calliphoridae) and houseflies (F. Muscidae), flesh flies can play a very important role in the field of forensic entomology, assisting investigations in determining how much time has passed since a person died. The species and life stage of the insects that colonise a human corpse can also provide important clues as to whether the body was disturbed or moved. Here's a video showing how flies helped solve a murder case:
More information on how forensic entomology helps solve crimes can be found here.