Spruce-fir moss spiders • Earth.com • Earth Image Gallery

Spruce-fir moss spiders, also called Microhexura montivaga, are endangered spiders that live at high elevations in the southern Appalachians. Probably the smallest spider in the world, the spruce-fir moss spider can only reach a length of 3 to 4 mm (about 1/8 inch).

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