Are There Black Widows in North Dakota?
No, black widows are not established in North Dakota. The state's harsh winters make survival impossible for these warm-weather spiders outdoors. Occasionally, one might arrive in a shipment from warmer states, but no wild population exists here. North Dakota residents have no reason to be concerned about black widows.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Northern Black Widow · Joseph McPhail CC BY
Western Black Widow · Rebecca Ray CC BY
Western Black Widow · Michael Eisen CC BY
- 1
- species recorded
- 7
- GBIF records
- August, June, July
- peak months
Black Widows are rare in North Dakota, so you might also want:
Real sighting data, source iNaturalist
Only 10 verified observations on iNaturalist of black widow have been logged in North Dakota, which fits how rare they are in the state. That low number is itself the most honest answer to whether you are likely to see one here.
No, black widows are not established in North Dakota. The state's harsh winters make survival impossible for these warm-weather spiders outdoors. Occasionally, one might arrive in a shipment from warmer states, but no wild population exists here. North Dakota residents have no reason to be concerned about black widows.
Are they in North Dakota?
Black widows do not live wild in North Dakota. The state's extreme cold winters, with temperatures regularly dropping well below freezing and often reaching minus 20 to minus 30 degrees Fahrenheit, are incompatible with the spider's biology. Black widows are warm-weather spiders that cannot survive prolonged outdoor exposure to North Dakota winters. No breeding population has ever established itself in the state, and encounters with wild black widows are essentially zero. Occasionally, a single black widow might arrive accidentally in a shipment of goods or a cargo container from warmer regions, but such arrivals are extraordinarily rare and do not result in established populations. For information aboutwildlife in North Dakota, residents need not worry about this particular spider.
How dangerous is it?
While black widows do not live in North Dakota naturally, understanding their medical significance provides useful context if an accidental specimen ever arrives. A black widow bite is medically serious, causing painful muscle cramps, sweating, and elevated blood pressure, typically beginning within 30 minutes to several hours. Symptoms can last several days if untreated. Children and elderly people face greater risk of serious complications. However, modern medicine has made black widow envenomation highly treatable. North Dakota has excellent poison control and emergency medical services capable of managing any venom exposure effectively. The practical reality is that North Dakota residents face essentially zero risk from this spider.
How to recognize one
Black widows are small, shiny spiders with a body about the size of a pea or small marble. Females are jet black with a distinctive red or orange hourglass shape on the underside of the abdomen. Males are smaller, lighter in color, and rarely bite. They build irregular, messy webs rather than neat geometric patterns. If you ever encounter a spider matching this description in North Dakota, it would be an accidental import, likely indoors or in a heated structure. The hourglass marking is the defining feature. Checkour wildlife guidesfor information about North Dakota spiders. Such a specimen would be extremely unusual in the state and should not inspire fear but rather curiosity as a wanderer far from its natural range. Most dark spiders in North Dakota are completely harmless native species.
What to do if you are bitten or stung
Although black widow bites are not a real concern in North Dakota, knowing basic first aid applies to any unexpected spider bite. If you were bitten by any spider and suspected it might be a black widow, wash the area with soap and water and stay calm. Remove any jewelry or tight clothing near the bite to prevent swelling from restricting blood flow. Keep the affected area still and at rest to slow any venom spread. Seek medical attention, though serious reactions are not expected from North Dakota spiders. This is general information, not medical advice; if you are bitten by any spider and concerned, call Poison Control at 1-800-222-1222, or 911 if symptoms develop. North Dakota emergency services are equipped to handle any medical concern professionally.
How to prevent encounters
Prevention of black widow bites in North Dakota is not a practical concern because the spider does not live wild in the state. However, basic awareness when handling goods shipped from warmer states makes sense. Inspect boxes and packages from southern states before opening them indoors, though the likelihood of finding a black widow is extremely low. Wear gloves when handling used equipment or stored items that have been exposed to warm climates. Look before reaching into dark spaces in warehouses or storage facilities. Most common spiders in North Dakota are harmless and often helpful for controlling pest insects. The actual native spider species in North Dakota pose no medical risk to residents.
Where in North Dakota and when
Black widows do not occur naturally anywhere in North Dakota. The entire state's climate is unsuitable for these warm-weather spiders. The coldest regions of the state, including areas of the northern Great Plains and the badlands, have never supported black widow populations. Even the warmest southern parts of North Dakota near the South Dakota border do not provide adequate warmth for year-round survival. The state experiences long, severe winters that kill any black widow unable to reach heated shelter. Summer temperatures are warm enough to support brief activity if a specimen arrived, but there is no breeding season establishment. The practical result is complete freedom from concern about black widows for anyone living in or visiting North Dakota.
Harmless lookalikes
North Dakota has many dark spiders that might be confused with a black widow if one ever arrived, but none of them are medically significant. Northern jumping spiders are small, curious, and harmless. Cobweb spiders live in corners of homes throughout the state and pose no threat. Dark sac spiders and cellar spiders are common indoors and entirely harmless. Wolf spiders, which are large and sometimes intimidating in appearance, are beneficial hunters that never bite defensively. The state's native dark spiders are either harmless or actually helpful for controlling mosquitoes and pest insects. North Dakota residents can enjoy the presence of spiders knowing that none of them are medically dangerous.
Frequently Asked Questions
Are black widows deadly? Black widows can deliver medically serious venom, but deaths are rare in healthy adults with proper medical care. This is not a concern in North Dakota because the spider does not live here. How common are black widow bites in North Dakota? There are no documented black widow bites in North Dakota because the spider does not establish populations in the state. What attracts black widows to North Dakota? Nothing, because the climate prevents survival. Occasionally a single specimen might arrive in a shipment from warmer states, but this is extraordinarily rare and does not result in any population. What should I do if I see one? If you spotted an unusual spider in North Dakota, you could safely observe it or photograph it to identify it, as the risk of it being a black widow is nearly zero. For information about the actual spiders and wildlife in North Dakota, visitour wildlife guidesorwildlife in North Dakota. To learn more about wildlife safety, checkmore on Black Widow in North Dakota.
Plan your trip
Best time to see black widow in North Dakota: August, June, July
See the month-by-month sighting calendar.
Plan your black widow sighting in North Dakota
7 verified black widow records have been logged in North Dakota, most recently in 2025. See the GBIF records.
Where to look in North Dakota
- Knife River Indian Villages National Historic Site · Wildlife Watching, Birdwatching · Find hotels
- Lewis & Clark National Historic Trail · Wildlife Watching · Find hotels
- North Country National Scenic Trail · Wildlife Watching, Birdwatching · Find hotels
- Theodore Roosevelt National Park · Wildlife Watching, Birdwatching · Find hotels
- Fort Union Trading Post National Historic Site · Find hotels
Frequently asked questions
Are they in North Dakota?+
Black widows do not live wild in North Dakota. The state's extreme cold winters, with temperatures regularly dropping well below freezing and often reaching minus 20 to minus 30 degrees Fahrenheit, are incompatible with the spider's biology. Black widows are warm-weather spiders that cannot survive prolonged outdoor exposure to North Dakota winters. No breeding population has ever established itself in the state, and encounters with wild black widows are essentially zero. Occasionally, a single black widow might arrive accidentally in a shipment of goods or a cargo container from warmer regions, but such arrivals are extraordinarily rare and do not result in established populations. For information aboutwildlife in North Dakota, residents need not worry about this particular spider.
How dangerous is it?+
While black widows do not live in North Dakota naturally, understanding their medical significance provides useful context if an accidental specimen ever arrives. A black widow bite is medically serious, causing painful muscle cramps, sweating, and elevated blood pressure, typically beginning within 30 minutes to several hours. Symptoms can last several days if untreated. Children and elderly people face greater risk of serious complications. However, modern medicine has made black widow envenomation highly treatable. North Dakota has excellent poison control and emergency medical services capable of managing any venom exposure effectively. The practical reality is that North Dakota residents face essentially zero risk from this spider.
More wildlife in North Dakota