![]() Fatalities from a female black widow bite are reported between 0.5% and 12%. ![]() The male is half the size of the female and tan in color with light stripes on the abdomen. The hourglass can also be yellow and sometimes white. The female can grow to 16mm in length and is black with a red hourglass mark on the lower abdomen. The Western Black Widow (Latrodectus hesperus) is the only venomous spider you will encounter in Utah. You will encounter them in fields and grasslands, on fences, on exterior walls, and in gardens. They prefer open areas, where they can actively hunt. The four eyes enable the bold jumping spider to see three hundred and sixty degrees around them. The spots are orange in juveniles and turn white with age. This is a black spider with spots and stripes on the legs and abdomen. The male can grow to 15mm in body length, while females can grow to 18mm. This spider is large with excellent vision, which enables them to stalk prey. The Bold Jumping Spider (Phidippus audax) is very common in Utah, belonging to the Phidippus genus. Take a look below at the most common spiders in Utah. Luckily this is a sedentary species and spends most of its time on its web.īites from the black widow include a neurotoxic venom that produces latrodectism, common symptoms include pain, sweating, vomiting, and muscle cramps. Bites can be fatal to older adults and children. They are the most dangerous spider to humans. The black widow spider is the only venomous spider you may encounter in Utah.
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