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The Fly what won't fly

Flies do not fly if the surrounding temperature is too cold for them
to move or if they haven't had time to build up the internal
temperatures needed for flight.
Unlike mammals, insects can't maintain steady internal temperatures
on their own. They depend on the surrounding temperature to get enough heat to operate their internal and external functions. Flies usually get their heat boost from the sun, but sometimes they shiver or vibrate their wings to elevate their internal temperatures.

Insects can also become infected by parasites that inhibit their
ability to fly. They act listless as if they have a fever. There is
even an evolutionary advantage to being helpless. While the infected
insect may be killed off easily, other (uninfected) insects in their
community can escape. The house fly is one of the insects in which
so-called "behavioral fever" has been shown. (It is even referred to
as "suicide.")

Muscidae - House fly

The housefly (Musca domestica) is a fly of the suborder Cyclorrhapha. It is believed to have evolved in the Cenozoic era, possibly in the Middle East, and has spread all over the world as a commensal of humans. It is the most common fly species found in houses. Adults are grey to black, with four dark, longitudinal lines on the thorax, slightly hairy bodies, and a single pair of membranous wings. They have red eyes, set farther apart in the slightly larger female.

The female housefly usually mates only once and stores the sperm for later use. She lays batches of about 100 eggs on decaying organic matter such as food waste, carrion, or faeces. These soon hatch into legless white larvae, known as maggots. After 2 to 5 days of development, these metamorphose into reddish-brown pupae, about 8 mm (0.3 in) long. Adult flies normally live for 2 to 4 weeks, but can hibernate during the winter. The adults feed on a variety of liquid or semiliquid substances, as well as solid materials which have been softened by their saliva. They can carry pathogens on their bodies and in their faeces, contaminate food, and contribute to the transfer of food-borne illnesses, while, in numbers, they can be physically annoying. For these reasons, they are considered pests.

Equipment -
Panasonic Lumix DMC-FZ72
Raynox 250 Lens

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