Are There Black Widows in South Dakota?
No, black widows are not established in South Dakota. These venomous spiders live only in warm southern and southwestern states. South Dakota's cool continental climate, from the Black Hills to the Great Plains, is too cold for black widows to survive. While they live in warmer regions, South Dakota residents do not need to worry about these spiders.
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
- 37
- GBIF records
- September, May, June
- peak months
Yes, black widows are in South Dakota. Next you'll want:
Real sighting data, source iNaturalist
50 verified observations on iNaturalist of black widow have been recorded in South Dakota, most often in September, May, June.
When black widow are recorded in South Dakota
No, black widows are not established in South Dakota. These venomous spiders live only in warm southern and southwestern states. South Dakota's cool continental climate, from the Black Hills to the Great Plains, is too cold for black widows to survive. While they live in warmer regions, South Dakota residents do not need to worry about these spiders.
Are They in South Dakota?
Black widows are not found in South Dakota. These spiders require warm, sustained temperatures, and South Dakota's cool continental climate does not provide them. The Black Hills region, which covers much of western South Dakota, is too cold even in summer for black widows to establish populations. The Missouri River valley and Great Plains regions are similarly unsuitable due to their cool winters and relatively cool summers. Black widows are found exclusively in warm southern and southwestern states where temperatures remain warm enough throughout the year for them to breed and survive. If a black widow were transported to South Dakota, it could not survive outdoors through fall or winter or establish a breeding population. South Dakota's seasonal climate is far too harsh for these temperature-sensitive spiders. Learn about the actualwildlife in South Dakotaand the spider species that truly live here. For more information about the region's real spiders, checkwildlife guides.
How Dangerous Is It?
Since black widows do not live in South Dakota, there is no local danger from these spiders. However, understanding black widow venom is valuable information if you travel to warmer regions. A black widow bite is medically serious and requires professional medical care. The venom affects the nervous system and can cause intense muscle pain, cramping, sweating, and other systemic effects. Symptoms usually develop within one to three hours of a bite. Death from a black widow bite is extremely rare in healthy adults, especially with prompt professional medical treatment. Most people recover completely with proper care. Most bites occur when the spider is accidentally pressed against skin while putting on clothing or reaching into a dark space. The bite itself may feel like a pinprick and might go unnoticed at first. Understanding the actual danger helps you put risks in perspective. Learn more aboutwildlife in South Dakotaand actual local wildlife species.
How to Recognize One
If you travel to warmer regions, knowing how to identify black widows helps you avoid accidental contact. Black widows are small spiders, typically about one half inch in body length, with a distinctly shiny jet black abdomen. The most recognizable feature is a bright red or red-orange hourglass marking on the underside of the abdomen. Some individuals have a red stripe running down the center of the back. The head and legs are glossy black. Male black widows are much smaller than females and often have red spots or stripes on their backs instead of the hourglass. These spiders are shy and prefer to hide in warm, dark, undisturbed places like woodpiles, under rocks, in tight building crevices, around porch eaves, and in storage spaces. They do not actively seek out humans and bite only when they feel threatened or are accidentally pressed against skin. In South Dakota, you will not encounter them in nature.
What to Do If Bitten or Stung
Since black widows do not live in South Dakota, bites are not a concern in your state. However, if you travel to a warmer region and believe you have been bitten by a black widow, take these steps immediately. Remove any tight rings or jewelry from the affected limb right away. Keep the bitten area still and avoid moving it more than necessary. Do not apply ice or heat. Do not attempt to treat it with cutting, sucking, or any home remedy. Seek medical attention immediately by going to an emergency room or urgent care facility. Tell medical staff that you may have been bitten by a black widow so they can provide appropriate treatment. This is general information, not medical advice; if you are bitten, call Poison Control at 1-800-222-1222, or 911 if symptoms are severe. Medical professionals can provide the proper care needed. South Dakota hospitals are well equipped to treat spider bites in residents traveling from other regions.
How to Prevent Encounters
Prevention is straightforward in South Dakota because black widows do not live in this state. However, if you travel to warmer southern states, practical steps reduce spider encounters. Wear closed shoes and long pants when hiking or working in brush and woodpiles. Shake out shoes, hats, and clothing before putting them on, especially items stored in dark places or closets. When camping or hiking in warmer states, inspect tents and sleeping bags carefully before use. Use a flashlight to check dark spaces like under rocks or inside cabin corners. Wear work gloves when handling firewood or stored items in warm climates. Keep shoes and sports equipment away from walls and dark corners. Avoid reaching into spaces you cannot see without a light first. In South Dakota, your wildlife concerns are different from those in warmer regions. Learn about the spiders and wildlife that actually live in your state by visitingyour local wildlife guides.
Where in South Dakota and When
Black widows do not occur anywhere in South Dakota at any season. However, understanding where they do live provides context. Black widows are found exclusively in warm southern and southwestern states, including Arizona, Nevada, southern California, southern New Mexico, Texas, and parts of the southeastern United States. They prefer warm, dry regions with temperatures consistently above 70 degrees Fahrenheit. In the states where they do occur, black widows are most active during warm months, typically April through October, when they hunt for food, mate, and lay eggs. They become dormant or die during winter. South Dakota's continental climate features cold winters with temperatures well below freezing, cool springs, mild summers, and cool falls. These conditions are the opposite of black widow habitat. The Black Hills and Great Plains regions are entirely unsuitable for black widow survival and breeding. To learn about spiders that actually live in your state, visit theSouth Dakota wildlife section.
Harmless Lookalikes
In South Dakota, if you find a small dark spider with red or orange markings, it is almost certainly not a black widow because black widows do not live in South Dakota. The spiders you are likely to encounter are harmless South Dakota natives. Wolf spiders are common throughout South Dakota in yards, gardens, and homes. They are brown or gray, do not have the distinctive hourglass mark, and are completely harmless. House spiders, including common cellar spiders with long thin legs, are found throughout South Dakota homes and basements and are harmless. Orb weavers create beautiful symmetrical webs in gardens and grasslands throughout the state and are entirely safe. Jumping spiders, small and curious with large forward-facing eyes, are found in South Dakota and are completely harmless. If you find any small dark spider in South Dakota, it is almost certainly one of these local harmless species. Knowing the realwildlife in South Dakotahelps you appreciate the spiders that actually share your environment.
Frequently Asked Questions
Are Black Widows deadly? Black widow bites are serious and require professional medical care, but death is very rare in healthy adults with prompt treatment. Most people recover fully. How common are Black Widow bites in South Dakota? Bites do not occur in South Dakota because black widows are not established here. No one in South Dakota has been bitten by a black widow in their home state. What attracts Black Widows to a house? Black widows look for warm, dark, undisturbed spaces like storage areas, closets, basements, and porch corners. They prefer to hide and avoid humans. In South Dakota, this is not a concern because they cannot survive here. What should I do if I see one? If you see a shiny black spider with a red hourglass mark while in South Dakota, it is definitely not a black widow because black widows are not established here. Most dark spiders in South Dakota are harmless. If you are traveling in the southwest and see one, leave it alone. For information about the spider species that live in your region, visityour wildlife guide.
Plan your trip
Best time to see black widow in South Dakota: September, May, June
See the month-by-month sighting calendar.
Plan your black widow sighting in South Dakota
37 verified black widow records have been logged in South Dakota. See the GBIF records.
Where to look in South Dakota
- Badlands National Park · Wildlife Watching, Birdwatching · Find hotels
- Jewel Cave National Monument · Wildlife Watching, Birdwatching · Find hotels
- Lewis & Clark National Historic Trail · Wildlife Watching · Find hotels
- Missouri National Recreational River · Wildlife Watching, Birdwatching · Find hotels
- Wind Cave National Park · Wildlife Watching, Birdwatching · Find hotels
- Minuteman Missile National Historic Site · Find hotels
Frequently asked questions
Are They in South Dakota?+
Black widows are not found in South Dakota. These spiders require warm, sustained temperatures, and South Dakota's cool continental climate does not provide them. The Black Hills region, which covers much of western South Dakota, is too cold even in summer for black widows to establish populations. The Missouri River valley and Great Plains regions are similarly unsuitable due to their cool winters and relatively cool summers. Black widows are found exclusively in warm southern and southwestern states where temperatures remain warm enough throughout the year for them to breed and survive. If a black widow were transported to South Dakota, it could not survive outdoors through fall or winter or establish a breeding population. South Dakota's seasonal climate is far too harsh for these temperature-sensitive spiders. Learn about the actualwildlife in South Dakotaand the spider species that truly live here. For more information about the region's real spiders, checkwildlife guides.
How Dangerous Is It?+
Since black widows do not live in South Dakota, there is no local danger from these spiders. However, understanding black widow venom is valuable information if you travel to warmer regions. A black widow bite is medically serious and requires professional medical care. The venom affects the nervous system and can cause intense muscle pain, cramping, sweating, and other systemic effects. Symptoms usually develop within one to three hours of a bite. Death from a black widow bite is extremely rare in healthy adults, especially with prompt professional medical treatment. Most people recover completely with proper care. Most bites occur when the spider is accidentally pressed against skin while putting on clothing or reaching into a dark space. The bite itself may feel like a pinprick and might go unnoticed at first. Understanding the actual danger helps you put risks in perspective. Learn more aboutwildlife in South Dakotaand actual local wildlife species.
More wildlife in South Dakota