Insects
While there are a million different types of insects, all have a hard exoskeleton which is segmented into three parts. In fact the word "insect" is derived from the Latin meaning segmented. See more »
what's inside: insects and arachnids
Insects and arachnids are the most popular wild animal on Earth. Read our collection of articles discussing all sorts of ants, bugs, butterflies, spiders and just about every other type of insect and arachnid.
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Arachnids
Arachnids have four pairs of jointed legs, two body sections and simple eyes. Arachnids are aggressive predators and include spiders, scorpions, mites and ticks. See more »
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featured articles
Amazing Animals: Bedbug Quiz
Good night, sleep tight, don't let the bedbugs bite. Are these insects the imaginary stuff of rhyme, or should we watch out for these tiny biters between the sheets?
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videos: insects & arachnids
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How Caterpillars Work
A caterpillar spends its life eating -- foliage, some animals like ants and snails, and even its own skin it previously shed. What do caterpillars do with all of this stored up food? And why do they use their waste as projectiles?
How Cicadas Work
If you're tired of the peace and quiet, take heart: The latest swarm of cicadas is set to emerge in the U.S. this spring. These insects produce a "song" that can reach 120 decibels -- very close to a level that can damage human ear drums. Learn about the 17-year cicadas.
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