Friday, December 4, 2015
The housefly (also house fly, house-fly or common housefly), Musca domestica, is a fly of the suborder Cyclorrhapha. It is the most common of all domestic flies, accounting for about 91% of all flies in human habitations, and indeed one of the most widely distributed insects, found all over the world. It is considered a pest that can carry serious diseases.
The adults live from two weeks to a month in the wild, or longer in benign laboratory conditions. Having emerged from the pupae, the flies cease to grow; small flies are not necessarily young flies, but are instead the result of getting insufficient food during the larval stage.
Some 36 hours after having emerged from the pupa, the female is receptive for mating.
Even though the order of flies (Diptera) is much older, true houseflies are believed to have evolved in the beginning of the Cenozoic era. They are thought to have originated in the southern Palearctic region, particularly the Middle East. Because of their close, commensal relationship with humans, they probably owe their worldwide dispersal to co-migration with humans.
House flies are capable of carrying over 100 pathogens, such as those causing typhoid, cholera, salmonellosis, bacillary dysentery (dysentery caused by bacteria), tuberculosis, anthrax, ophthalmia (eye disease), and parasitic worms. Some strains have become immune to most common insecticides.
That the list of ills is this long is testimony to the long duration in which flies have been preying on human habitations. The diseases are spread through mechanical transmission of parasites, bacteria and viruses on its hairs, mouthparts, vomitus and feces.
House flies feed on liquid or semiliquid substances beside solid material which has been softened by saliva or vomit. Because of their large intake of food, they deposit feces constantly, one of the factors that makes the insect a dangerous carrier of pathogens.
The Cenozoic Era is the most recent of the three major subdivisions of animal history. The other two are the Mesozoic and Paleozoic Eras. The Cenozoic spans only about 65 million years, from the end of the Cretaceous Period and the extinction of non-avian dinosaurs to the present. The Cenozoic is sometimes called the Age of Mammals.
I've caught you napping,
the way your eyes work, compound
and deep shiny black,
and you fly backwards
as easily as forwards,
and sideways to dodge
the descending hand,
but I've caught you in a jar,
feel you cuss me out.
March 31, 2011 3:48 PM