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Flies are a type of insect from the order Diptera derived from the Greek language means two and the ptera means wings. The most obvious difference between flies and other insect orders is that flies have a pair of flying wings and a pair of dumbbells, which come from the rear wing, in metatorax except for some fly species that cannot fly. The only other insect order that has two wings that really function and has a halter is Strepsiptera. But, in contrast to flies, the Strepsitera dumbbell is in the abdomen and wing in metatorax.
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The spider is an arthropod-shaped animal with two body segments, four pairs of legs, no wings, and no mouth chewing. All types of spiders are classified into the Araneae order, and together with the scorpions, ketonggeng, the mites - all eight-legged - are included in the Arachnida class. The field of study of spiders is called arachnologi.
Spiders are carnivorous predators, sometimes even cannibals. The main prey is insects. Almost all types of spiders, with the exception of about 150 species of the Uloboridae and Holarchaeidae tribes, and the Mesothelae suborder, are able to inject through their fangs to their enemies or prey. However, of the tens of thousands of species that exist, only about 200 species whose bites can harm humans.
Not all spiders make nets to catch prey, but all of them are able to produce silk thread - that is, strands of thin but strong protein fibers - from glands called spinnerets which are located on the back of the body. This silk fiber is very useful to help the movement of spiders, swinging from place to place, trapping prey, making egg bags, protecting nest holes, and so on.
but what if flies and spiders fight? maybe a small spider wants to put a fly the same size as him.
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