Y39-Spiders-6 - SPIDERS More than 35,000 species of spiders...

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SPIDERS More than 35,000 species of spiders occur in the world. Of these, about 3,400 species in 64 families are found in North America. In North America, primary concerns are the Black Widow and Brown Recluse.
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Spiders in the USA Black Widows Brown Recluses
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The Black Widow The most venomous spider in North America. Generally not deadly unless victim is very young or old. Identifiable by shiny black body and red “hourglass” on belly. Relatively small, usually around 1.5” in size.
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Where They Live Seldom disturbed areas Stock piles Storage Areas Shoes left outside Basements/Attics Freshly cleared sites Cobwebs can be a sign (but not always)
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The BITE Venom is 15 times more potent than that of a rattlesnake (relatively much less is injected). Only 63 deaths were reported in the United States between 1950 and 1989 Bite is often not painful and may go unnoticed at first. Symptoms include: abdominal pain similar to appendicitis, pain to muscles or the soles of the feet, alternating salivation and dry mouth, paralysis of the diaphragm, profuse sweating and swollen eyelids.
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This note was uploaded on 08/27/2011 for the course BCN 4735 taught by Professor Staff during the Spring '08 term at University of Florida.

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Y39-Spiders-6 - SPIDERS More than 35,000 species of spiders...

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