April 19, 2010

Interesting Facts about Forensic Entomology


Flies taste, smell, and feel with the hairs that cover their bodies. The hairs on the fly’s mouthparts and feet are used for tasting. Flies taste what they walk on.


When writing the name of true flies, which are in the order Diptera, use the word ‘fly’ in a separate word; blow fly. When writing the name of other insects with the word ‘fly’ in their name, write one word; firefly.

Flies use other hairs to tell them when they touch something. These hairs bend when touched.

The eyes of a fly do not have eyelids, so flies rub their eyes with their feet to keep them clean.

A fly cleans itself constantly.

There are 120,000 species of flies.

After studying 300,000 flies, researchers concluded that an average fly carries 2 million bacteria on its body.

The dehydrated larvae of the Polypedilum vanderplanki (a type of fly) were able to withstand exposure to liquid helium (-270 degrees Celsius) for up to five minutes with a one hundred percent survival rate.

Polypedilum vanderplanki breed in small pools on unshaded rocks in northern Nigeria and Uganda where they withstand an environment, which is alternately dry and
flooded. Polypedilum vanderplanki is the only insect definitely known to survive drying to <3% moisture.

A fly beats its wings 200 times a second, three times faster than a hummingbird.

According to researchers, the favourite colour of flies is red, followed by orange, black, violet, green, blue, white and yellow.

Fly eggs hatch into maggots within 24 hours.

The dung beetle lays its eggs in a ball of dung and then buries it. They can quickly and effectively dispose of piles of animal faeces before the flies have a chance to start breeding in it.

Several species of dung beetle have been introduced into Australia and they are proving to be very effective at controlling the fly problem.

Growing role of Forensic Science

The first recorded evidence of the use of forensic science is contained in a book produced in Song dynasty China in 1248.

Hsi Duan Yu (Washing Away of Wrongs) details how an investigator established that a particular sickle was used to kill a murder victim by testing different blades on animal carcasses and comparing the wounds.

In more recent times forensic science has become a greatly specialised field, with many disciplines involved besides genetics, including:

Classification of Forensic Science: (Widely Used)

Anthropology: Forensic anthropologists, often working with pathologists, as seen on TV shows such as CSI and Silent Witness, study badly decomposed remains to work out age, sex, height and ancestry, as well as investigating signs of trauma or disease.



Entomology: The study of insects, which helps establish issues such as time and place of death, using information such as the gestation period of species which lay eggs on dead bodies.



Palynology: Detailed knowledge of pollen types and distribution can help establish time and location of death, and whether a body has been moved.



Toxicology: A variety of techniques are used to detect the presence in a body of any of a wide range of poisons, chemicals and drugs.

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