Crawling Spider

~Sunil, Sharat & Praveen

Spiders are arachnids belongs to a class of arthropods. Unlike other insects they have 8 legs. There are more than 46,000 known species of spiders, found all over the world. Their size varies from 0.11 inch to 12 inches. Most of the spiders don’t see very well even though they have 8 eyes. Jumping spider is an exception, which can see more colours than humans. All spiders are predators which feed mainly on insects. They typically have a well-developed sense of touch. Few spiders are active hunters that chase and kill their prey. Other spiders weave webs or silk snare to capture their prey. Webs are instinctively constructed and effectively trap flying insects. Many spiders inject their venom(poison) into their prey to kill it quickly, whereas others first use silk wrappings or web to immobilize their victims. Spiders have venom but only a handful like the Black widow and the Brown recluse are dangerous to humans. Majority of spiders are harmless and help in controlling insect population that could otherwise devastate crops. Without spiders to eat pests harmful to agriculture, it’s thought that our food supply would be put at risk.

 

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