Myth: "Eight Legs" Always Means "spider" - Burke Museum

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Myth: "Eight legs" always means "spider" Illustration: Henry C. McCook Illustration: Henry C. McCook

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Myth: You can always tell a spider because it has eight legs.

Fact: Not exactly. Scorpions, harvestmen, ticks, and in fact all arachnids—not just spiders—have four pairs of legs (see illustrations). Insects have three pairs. Also, notice that I said "four pairs" instead of "eight." The number of leg pairs (one pair per leg-bearing segment) is more significant than individual legs, which can be lost.

Spider Myths

"Everything that 'everybody knows' about spiders is wrong!" —Rod Crawford sets the record straight with Spider Myths.

Examples of 6 of the 11 orders of arachnids. Only one is a spider.

A spider, Missulena occatoria (Australia).

A whipscorpion, Abaliella dicranotarsalis.

A scorpion, Charmus indicus (India).

A pseudoscorpion, Chelifer tuberculatus (Algeria).

A harvestman, Phalangium opilio (worldwide).

A solpugid, Ammotrechella cubae (Cuba).

Explore More Myths

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Spider Myth Resources

Explore even more! Additional spider resources and more myths (poor spiders can't catch a break!).

Learn More

Photo: Cathy Morris/Burke Museum Photo: Cathy Morris/Burke Museum

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