The caddisflies are an order, Trichoptera, of insects with approximately 12,000 described species. Also called sedge-flies or rail-flies, they are small moth-like insects having two pairs of hairy membranous wings. They are closely related to Lepidoptera (moths and butterflies) which have scales on their wings, and the two orders together form the...
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http://en.wikipedia.org/wiki/Caddisfly
any of a group of mothlike insects that are attracted to lights at night and live near lakes or rivers. Because fish feed on the immature, aquatic ... [3 related articles]
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http://www.britannica.com/eb/a-z/c/2
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