Black spiders in Minnesota range from familiar jumping spiders to less often seen species with dark, shiny bodies. This guide covers 10 black or notably dark spiders that people may encounter in the state, the features that help distinguish them, and what their presence usually means. It is for homeowners, hikers, and anyone trying to make sense of a spider found indoors or outside; color alone is not a reliable way to identify one.
1. Bold Jumping Spider
The bold jumping spider, Phidippus audax, is a sturdy, often glossy black spider with three conspicuous pale spots on its abdomen; those spots may look white or orange in younger spiders. It hunts during the day rather than catching prey in a web, and may be seen on sunny walls, fences, garden plants, or near windows. Its large forward-facing eyes and short, powerful legs are useful clues, and it is not considered dangerous to people.
2. Zebra Jumping Spider
The zebra jumping spider, Salticus scenicus, is small and compact, with black-and-white bands across its body and legs. It commonly patrols sunny vertical surfaces such as siding, window frames, and masonry, where it watches for tiny insects before making a quick leap. Its striped pattern separates it from the larger, more robust bold jumper, though both are active hunters and do not rely on a prey-catching web.
3. Northern Black Widow
The northern black widow, Latrodectus variolus, is a real but uncommon spider to keep in mind in Minnesota, not a routine explanation for every shiny black spider. Adult females are glossy black and may have a broken or divided red hourglass marking on the underside; males and immature spiders are smaller and often patterned. It favors sheltered, undisturbed places, so do not reach blindly into stored items or woodpiles, and seek medical advice promptly after a suspected bite.
4. Eastern Parson Spider
The eastern parson spider, Herpyllus ecclesiasticus, is a fast-moving, dark hunting spider that may wander into homes, especially when seeking shelter. Its charcoal to black abdomen usually has a pale, elongated marking that can resemble an old-fashioned necktie or clerical collar, while the front body and legs may appear brownish. It does not build a capture web; during the day it hides in a silk retreat in a crack or beneath an object and comes out to hunt at night.
5. Northern Cobweb Spider
Steatoda borealis, often called the northern cobweb spider, is a dark member of the cobweb-spider family and can be mistaken at a glance for a black widow. Its rounded abdomen is generally brown to nearly black and lacks the distinctive red hourglass of a female widow; color and markings vary, so a blurry photo is not enough to settle an identification. It makes a loose, irregular web in quiet corners and sheltered spaces, where it catches small insects rather than pursuing people.
6. Dark Fishing Spider
The dark fishing spider, Dolomedes tenebrosus, is a large, dark-brown spider that may look nearly black in dim light, with mottled markings and long legs. It is associated with wooded areas and is often found on tree trunks, near water, or in buildings; despite its name, it can hunt away from water and does not need to catch fish. Its size can be startling, but it generally avoids people, and a close encounter is not by itself evidence of a dangerous species.
7. Tigrosa Helluo Wolf Spider
Tigrosa helluo is a large wolf spider found in the eastern and central United States, including the upper Midwest, and its dark brown body can appear black from a distance. Wolf spiders have strong legs, patterned bodies, and prominent eyes; unlike web-building spiders, they roam on the ground to catch insects. A female may carry her egg sac attached to the rear of her body and later carry spiderlings on her back, a distinctive behavior that can help explain a cluster of tiny spiders.
8. Broad-Faced Sac Spider
The broad-faced sac spider, Trachelas tranquillus, has a dark gray to brown abdomen and a contrasting reddish-brown front body and legs, so it may be described as a black spider when seen quickly. It is a nocturnal hunter that can turn up indoors, often wandering across floors or walls rather than sitting in a large web. Its color is not a dependable danger signal; identify it by its overall compact shape and contrasting front section, and avoid handling it while trying to get a closer look.
9. Common House Spider
The common house spider, Parasteatoda tepidariorum, is usually mottled brown rather than truly black, but some individuals look very dark in the shadows of a web. It builds an irregular cobweb in corners, garages, basements, sheds, and around window frames, and its abdomen is often patterned rather than uniformly glossy. Seeing one in a web is useful context: it is a stationary web builder, unlike a jumping spider or wolf spider, which actively roams to catch prey.
10. Dark Ground Spiders
Ground spiders in the family Gnaphosidae include several dark, ground-dwelling spiders that can be encountered in Minnesota, so a family-level identification may be more realistic than naming a species from a quick glance. Many have a dark, elongated abdomen and stout-looking front body, and they hunt at night instead of making an exposed prey-catching web. Some hide by day under stones, bark, or other cover, and a close photograph of the body and eyes is often needed to distinguish them from other small dark hunters.
How to Choose
For a spider found in Minnesota, start by asking what you mean by choose: most people are deciding whether a spider is a harmless visitor, whether it should be left alone, or whether it needs expert identification. Do not use black color, size, or a single red mark as the sole test. Compare the shape of the body, the pattern on the abdomen, the length and posture of the legs, and whether the spider is sitting in a web or moving freely.
Location and behavior narrow the possibilities. A small striped spider moving across a sunny window is more consistent with a zebra jumper than a widow; a large spider on a tree trunk in a wooded area may be a fishing spider. An irregular web in a basement corner points toward a cobweb spider, while a fast spider emerging from a crack at night could be a parson spider or another ground-hunting species. These are clues, not definitive identifications, because spiders can wander and markings vary.
If you need a reliable identification, take a clear, well-lit photograph from a safe distance. Include a view of the top of the spider and, only if it can be done safely, the underside; a size reference placed nearby is more useful than holding the spider. Record where it was found and whether it was in a web, under an object, or outdoors. A local university extension office, naturalist, or qualified arachnology group may be able to help, but a photo that hides the markings may not support a species-level answer.
When deciding what to do, consider the setting rather than trying to eliminate every spider. Most spiders are predators of insects and are not aggressive toward people; moving an individual outside with a container is often an option if it is clearly not a widow and can be handled without direct contact. For an unidentified spider in a place where someone might touch it, keep people and pets away and contact a pest professional or local expert for guidance. Do not put bare hands into dark storage areas, shoes, or firewood piles.
Frequently Asked Questions
Are black spiders in Minnesota dangerous?
Most dark spiders people encounter in Minnesota are not medically important and prefer to avoid people. The northern black widow is the main species in this list that warrants particular caution, but it is uncommon. If someone may have been bitten by a widow or develops concerning symptoms after a bite, contact a medical professional or poison control rather than relying on a photo-based identification.
How can I tell a black widow from a false widow?
A mature female black widow is typically glossy black and has a red hourglass marking on the underside, although its shape can be divided or incomplete. Northern cobweb spiders and other dark cobweb relatives may have rounded abdomens and similar web habits but do not show the same characteristic hourglass. Because juveniles and males can look different from adult females, treat uncertain identification cautiously and do not pick up the spider.
Do black spiders come into Minnesota homes?
Yes, several dark species may enter homes, and others live in webs around buildings. Parson spiders and broad-faced sac spiders may wander indoors, while common house spiders and northern cobweb spiders can occupy quiet corners. A spider indoors does not necessarily indicate an infestation; it may be a lone animal that entered through a gap or was carried in with stored items.
What should I do if I find a large black spider?
Keep a little distance and avoid handling it. If it is in a safe location, leaving it undisturbed is usually reasonable; if it must be moved, use a container only when you can do so without putting your hands near the spider. If it resembles a widow or you cannot identify it and it is in a high-contact area, keep people and pets away and ask a qualified local professional for advice.
Can I identify a spider from a web alone?
A web can suggest a group, but it rarely proves a species. Loose, irregular cobwebs are associated with cobweb spiders, while many hunting spiders—including jumping spiders, wolf spiders, and fishing spiders—do not use a web to capture prey. Photograph the spider itself when possible and include the location and web context; those details together are more useful than the web alone.
Final Thoughts
In Minnesota, a black-looking spider may be a bold jumper, a web-building cobweb spider, a ground hunter, or simply a brown species seen in poor light. Look for markings and behavior instead of relying on color, and remember that the northern black widow is uncommon but deserves respectful distance. When identification matters, a clear photograph and help from a knowledgeable local source are safer and more reliable than handling the spider.