From the innocent daddy longlegs to the harmful brown recluse, here are the most common house spiders, how to identify them, and when to worry about a bite, according to entomologists. A tool to automatically identify spiders found in the United States. Identify a spider by answering questions.
COBWEB SPIDERS / COMBFOOTED SPIDERS Family Theridiidae Identification Body 1/3 inch long. Jaws (chelicerae) move side to side, scissors-like. Eyes: eight small eyes closely grouped.
Abdomen round. Color variable. Legs short and spindly.
Distribution More than 230 species of cobweb weavers occur in North America north of Mexico. The American house spider, Parasteatoda (previously Achaearanea. Identification Tips Size: Body length ranges from 1/4 to 1/2 inch.
With legs, the spider appears larger and more spread out. Eyes: Unusually for spiders, it has six eyes arranged in three pairs-one in the front and two on each side. Marking: A dark, violin-like shape is visible on the cephalothorax.
This marking is clearer in mature spiders. Color: The entire body is a consistent tan or. The false black widow spider can grow to 10.5mm in body length and has a large round bulb.
Spider identification: To identify a cardinal jumper, look for its brightly-colored orange to red cephalothorax and abdomen, two large central eyes, and spiny body and legs. The yellow sac spider has a pale yellow, light tan or cream-colored body that can contain a hint of green. Measuring just 0.15"-0.31" long, the yellow sac spider is small.
It's often mistaken for a brown recluse spider, but the yellow sac spider doesn't have the fiddle. C. inclusum is a light yellow to cream color, with the jaws (chelicerae), tips of the tarsi, and palps dark brown.
C. mildei has a slightly greenish tinge to its abdomen and a pale yellow cephalothorax. Learn which house spiders are the most common, the most helpful, and the most dangerous.
See types of common house spiders in the U.S., with pictures.