Spider Essay Example | Topics and Well Written Essays - 1250 words

Spider - Essay ExampleTo date, 40,000 species of spiders substantiate been recorded. It has been said that thither might be thousands more which have yet to be discovered. These types have been undercoat in all crock ups of the world except for Antarctica. According to Carl Alexander, seed of Spiders, volume 8 (1929), the kingdom of spiders is Animalia, the phylum is Arthropoda, the class is Arachnida, and the order is Araneae. (8) According to James H. Emerton, author of The common spiders of United States (1961), the or so interesting types are mouse spider and black leave behind spider. Mouse spider is discovered first in Australia, is not harmful to human, and its bite is dry. The black leave behind spider is found around the world, has a grand body, and excretes poison secretion that is harmful to human nerve (25). The scientific name given to the black leave spider is Latrodectus Hesperuses. This spider is mostly found in the United States, mainly, North America. The s pider got its name from the fact that the female spiders usually eat the male spiders after mating. This characteristic of the female black widow spider makes a male spider to approach the female carefully and gradually. In order to mate, the male spider would vibrate the female spiders web in a certain way so that the female recognizes it and allows it to mate with her. The male spiders are not as venomous as the females as their main purpose is to mate hence, they spend their entire lifetime searching for mates and even stop feeding. The female black widow spider have been known to be quite venomous, however, it is not life threatening as it secretes only a small amount of poison when bites. The body structure of a female black widow spider and a male are very different. The females have a shiny black body which is relatively longer. Moreover, there is a red marking just below the abdomen. The females are poisonous than the males. The males, however, are almost half the size of fe males. They have longer and leaner legs and most of them have red and yellow marks at the back. Both males and females body is parted in two. Their jaws are strong which support poisonous fangs. They have a hard, long exoskeleton. According to Donald M. Tuttle and Edward W. Baker, authors of Spider mites of the United States, spiders have about six holes underneath their abdomen called eyes. The silk goes out from these holes to expose to the air, then, it converts to thread. Spiders female path its web from an extremely thin elastic silky thread. They use the glands that are in the lower part of their abdomen to form the web (34). According to Maggie Daley, author of Illinois insects and spiders, spiders have eight legs, eight eyes, and they do not have wings or chewing organs. Moreover, their bodies consist of two parts, the chest and the external part. The chest part is consists of the head with the brain and eyes, the stomach, legs and the mouth. The external part consists of l ungs, heart, liver, reproductive organs and the glands that play important role in producing the silk. (14) The black widow spider is further categorized into three main types, the Northern Black widow Spider, the Western Black Widow Spider and the Southern black Widow Spider. The Northern black widow is mostly found in the north east parts of USA and south east Canada. The Western Black Widow is mainly found in the western parts of USA, Canada and some parts of Mexico. Furthermore, the