Common Spiders With Red Legs

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Though widely feared, few spiders are dangerous to humans and all help to reduce insect populations.
Though widely feared, few spiders are dangerous to humans and all help to reduce insect populations. (Image: imortalcris/iStock/Getty Images)

Spiders vary widely in appearance and habits. Some weave flat, vertical webs, while others weave spherical or funnel-shaped webs. Still others don’t weave webs at all and actively hunt their prey. As arachnids, all spiders have eight legs and multiple eyes, usually five. However, of the 4,000 or so species on the North American continent, only a small number of common spiders have legs that are red or some variation of the color.

Marbled Orb Weaver

With more than 1,500 species found worldwide, the orb weavers are the largest genera of spiders on earth. The marbled orb weaver (Araneus marmoreus) has distinctive coloration, with a large abdomen of orange or yellow with geometric black or brown lines. The medium-length legs are bright red at the thorax and end in wide black-and-white bands. Ranging from northern Canada and Alaska south to Texas and east to the Atlantic Coast, these spiders are harmless to humans.

The orb weaver has distinctive colloration.
The orb weaver has distinctive colloration. (Image: ArendTrent/iStock/Getty Images)

Sow bug Killer or Woodlouse Hunter

The sowbug killer (Dysdera crocata) ranges over scattered areas of the United States and Canada. This fearsome-looking spider has a glossy body and large, powerful mandibles that allow it to bite through the carapace of sow bugs (also called woodlouse or pill bugs). The body is about three-quarters inches long, with an elongated muddy, light gray abdomen, dark reddish-orange thorax and legs of a similar color at the thorax but fading to orange near the ends. Despite their appearance, they are harmless to humans.

Brown Recluse

Also called the violin spider or fiddleback because of the violinlike marking on the top of its cephalothorax (fused head and thorax), the brown recluse (Loxosceles recluse) is common from the middle Midwest states into Texas and to the Gulf Coast. Several subspecies occupy niches in southern Texas and New Mexico, Arizona, south Nevada and Southern California. The entire spider is a grayish-brown color, but the long, thin legs are muddy reddish-brown. Short, velvety hairs cover the entire body. Both males and females are venomous, and while a bite rarely kills humans, it can cause tissue necrosis — the death of skin and muscles cells that can cause severe pain and disfigurement.

The brown recluse has a violin marking on its head.
The brown recluse has a violin marking on its head. (Image: Clint Spencer/iStock/Getty Images)

Cross or European Garden Spider

This is one of the most common garden spiders in North America. Growing nearly an inch in length — and with very long legs usually grouped together in pairs, giving a crosslike appearance — this is one of America’s larger spiders, though they are harmless to humans. Some are banded, striped or have blotches of color, but the colors are most often orange, yellow, white and brown. The banded legs contain yellow or white, brown and rust stripes, and these spiders create large, very strong webs to snare their victims.

Cross spiders are distinctive for their giant webs and large bodies.
Cross spiders are distinctive for their giant webs and large bodies. (Image: Matauw/iStock/Getty Images)

Arrow-Shaped Micrathena

These small arachnids are one of the most colorful and strange-looking spiders in North America. Ranging from the East Coast to the Midwest and south into Texas, the spiny ridges on the abdomen of the females may be nature’s way of warding off predators. The arrow-shaped Micrathena (Micrathena sagittata) belongs to the orb weaver species and is harmless to humans. The elongated, inverted V-shaped abdomen features two backward-facing prominences that look like stingers but are not. The top of the abdomen has large splotches of white and the rest of the spider, including the legs, is a rust-red color.

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