Flies are widespread almost everywhere, they can be found both in the mountains and in tropical countries. Being carriers of such dangerous diseases as cholera, dysentery, typhus, as well as helminths, flies also annoyingly besiege a person. The Bible in the Book of Exodus describes ten calamities that befell Egypt. The fourth were flies.
Instructions
Step 1
House flies (lat. Musca domestica) belong to the family of real flies. This is the most common species, but it is almost impossible to find them in the wild. They live only where people live.
Step 2
External features
The body length of a house fly is usually up to 1.5 cm (in its largest congeners, the length can reach 7.5 cm). The house fly's eyes are composed of 4,000 hexagonal lenses, giving it almost panoramic vision. In addition, the structure of her eyes allows her to view objects in opposite directions at the same time. The fly's whiskers, as well as other hairs located on its body, have an unsurpassed sensitivity to vibrations and vibrations in the air. It is this that very often saves domestic individuals from the owner's fly swatter. The fly feeds through the proboscis, with which it is able to absorb only food previously liquefied with the help of gastric juice.
Step 3
The lifespan of house flies
The development of a fly occurs in three stages - pupa, larva, imago, the duration of the periods is no more than 20 days. The life span of a house fly, along with other insects, is short. It can range from several days to 1, 5 months. On average, their lifespan is about 3 weeks. This is provided that a person does not kill the insect on his own.
Step 4
The duration of the existence of a fly is significantly influenced by the temperature conditions of the environment. Flies are capable of surviving at temperatures from 8 to 45 ° C. The most suitable temperature for their life is 21-24 oC, which often corresponds to the temperature in apartments and houses. The lifespan of flies is extended even when they hibernate. In this state, they can endure the winter.
Step 5
Procreation
Despite such a short and dangerous life, flies have an enormous ability to produce offspring. One female lays up to 2000 eggs in her short eyelid. But, it is worth noting that not all eggs subsequently appear flies and not all of them will reach the age when they can produce further offspring. The period of development of the larvae of flies does not exceed 25 days, after which it pupates, and no later than three days a fly appears, capable of reproduction after 36 hours. Thus, it turns out that about 20 generations of this insect are replaced within one year.
