Are There Black Widows in Maine?
No, Black Widows are not established in Maine. This venomous spider lives in warm climates and cannot survive Maine's cold winters outdoors. While one might rarely arrive in a shipment, established populations do not exist here. Understanding where this spider actually lives and recognizing harmless lookalikes can ease unnecessary worry about yard and home safety.
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
- 3
- GBIF records
- October, November
- peak months
Black Widows are rare in Maine, so you might also want:
Real sighting data, source iNaturalist
Only 2 verified observations on iNaturalist of black widow have been logged in Maine, 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 Maine. This venomous spider lives in warm climates and cannot survive Maine's cold winters outdoors. While one might rarely arrive in a shipment, established populations do not exist here. Understanding where this spider actually lives and recognizing harmless lookalikes can ease unnecessary worry about yard and home safety.
Are they in Maine?
Black Widows are not established in Maine. The state's cold climate, particularly harsh winters, makes it impossible for this heat-loving spider to survive outdoors year-round.Black Widows in Mainedo not occur naturally anywhere in the state. They are found across the southern and central United States, with populations common from the mid-Atlantic states southward. They are rare or absent throughout New England, including Maine. The nearest established populations live in Maryland and Virginia. Maine's outdoor temperatures simply cannot support the survival and reproduction of this species.Maine wildliferemains free of this dangerous spider.
How dangerous is it?
A Black Widow bite is medically significant and requires attention, though deaths are very rare. The venom affects the nervous system and can cause muscle pain and cramping within an hour of the bite. Most healthy adults experience painful symptoms but recover with medical care. Severe reactions are more likely in very young children, elderly people, or those with heart disease. Symptoms may include severe muscle pain, cramping, sweating, and tremors. The bite itself is often not felt, and many people do not realize they have been bitten until symptoms appear. If you travel to areas where Black Widows live, learn toidentify them and stay safe.
How to recognize one
Black Widows are small, shiny spiders about the size of a pea in body length. They are jet black or very dark brown with a distinctive red or orange hourglass marking on the underside of the abdomen. The hourglass is the key identifying feature. These spiders are not aggressive and prefer to hide in dark, undisturbed places such as woodpiles, leaf litter, dense brush, and the corners of garages or sheds. They are most active at night. Unlike some spiders, Black Widows do not have long legs or a large, fuzzy appearance. The female is larger and more prominent than the male.Learn more about Maine wildlife safety.
What to do if you are bitten or stung
Stay calm and avoid panic. Wash the bitten area gently with soap and water. Remove any rings, bracelets, or tight clothing from the area, as mild swelling may occur. Sit or lie down to keep the bitten limb still, and do not attempt to exercise or move around more than necessary. Apply a cold cloth if available, but do not apply ice directly to the skin. Seek medical attention as soon as possible. If you are in Maine and encounter a Black Widow, you should contact your local hospital or clinic. Medical professionals can provide muscle relaxants if needed and monitor your symptoms. Do not attempt any field treatment. Do not cut the bite, apply heat, or take any medications without medical guidance. 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.
How to prevent encounters
Since Black Widows do not live in Maine, prevention is straightforward. If you receive a shipment from a warm southern state, inspect boxes carefully in a well-lit area before bringing them indoors. Wear gloves if opening boxes from unfamiliar sources. When traveling to southern states, be cautious in basements, storage areas, and dark corners of buildings. Wear closed-toe shoes and long pants if hiking in spider habitat. Avoid reaching into dark spaces without looking. Shake out clothes and bedding if staying in southern areas. Keep your home and yard in Maine clean and free of clutter, which is good practice against all spiders and other pests.Find more about spider safety on our wildlife guides.
Where in Maine and when
Black Widows do not occur naturally anywhere in Maine. They cannot establish populations in the state because winter temperatures are far too cold for their survival. Even in the warmest southern parts of Maine, such as the Portland area and southern coast, outdoor Black Widow populations cannot survive the winter. During summer months when northern states sometimes experience heat waves, a stray Black Widow might theoretically wander into Maine, but this would be a rare accident, not a normal occurrence. If you travel to warmer regions south of Maine, such as Maryland, Virginia, or the Carolinas, Black Widows are more common in warm months from June through October.Maine's wildlife guidedocuments the spiders actually found in this state.
Harmless lookalikes
The spiders you find in Maine are far more likely to be harmless species than Black Widows. Common harmless spiders in Maine include the cellar spider, often called a daddy longlegs, which has very long, thin legs and a small body. Cellar spiders are completely harmless and actually help control pest insects. Wolf spiders are another common Maine species, with a brown color and a stockier build than Black Widows. They hunt on the ground and are not venomous to humans. Ground spiders and sheet web spiders are also common and harmless. The common jumping spider is a small, fuzzy spider with good vision and is completely harmless. If you find a shiny black spider in Maine, it is almost certainly a harmless species or a stray, not an established Black Widow. Look for the bright red or orange hourglass marking to confirm identity.
Frequently Asked Questions
Are Black Widows deadly in Maine? No, Black Widows are not established in Maine and do not pose an ongoing threat to residents. While a bite from any Black Widow can be serious, deaths are very rare even in places where the spider lives. How common are Black Widow bites in Maine? Black Widow bites are essentially zero in Maine because the spider does not live here. If you have concerns about a bite from an unknown spider, seek medical advice immediately. What attracts Black Widows to a house? Black Widows prefer dark, undisturbed spaces like storage areas and garages. In Maine, prevention during shipments from southern states is the main concern. What should I do if I see one in Maine? If you find any spider that looks like it might be a Black Widow, photograph it carefully and contact your local wildlife authority or state department of natural resources.Check our wildlife databasefor species identification help.
Plan your trip
Best time to see black widow in Maine: October, November
See the month-by-month sighting calendar.
Plan your black widow sighting in Maine
3 verified black widow records have been logged in Maine, most recently in 2024. See the GBIF records.
Where to look in Maine
- Acadia National Park · Wildlife Watching, Birdwatching · Find hotels
- Appalachian National Scenic Trail · Wildlife Watching, Birdwatching · Find hotels
- Katahdin Woods and Waters National Monument · Wildlife Watching, Birdwatching · Find hotels
- Saint Croix Island International Historic Site · Wildlife Watching · Find hotels
- Frances Perkins National Monument · Find hotels
- Maine Acadian Culture · Find hotels
Frequently asked questions
Are they in Maine?+
Black Widows are not established in Maine. The state's cold climate, particularly harsh winters, makes it impossible for this heat-loving spider to survive outdoors year-round.Black Widows in Mainedo not occur naturally anywhere in the state. They are found across the southern and central United States, with populations common from the mid-Atlantic states southward. They are rare or absent throughout New England, including Maine. The nearest established populations live in Maryland and Virginia. Maine's outdoor temperatures simply cannot support the survival and reproduction of this species.Maine wildliferemains free of this dangerous spider.
How dangerous is it?+
A Black Widow bite is medically significant and requires attention, though deaths are very rare. The venom affects the nervous system and can cause muscle pain and cramping within an hour of the bite. Most healthy adults experience painful symptoms but recover with medical care. Severe reactions are more likely in very young children, elderly people, or those with heart disease. Symptoms may include severe muscle pain, cramping, sweating, and tremors. The bite itself is often not felt, and many people do not realize they have been bitten until symptoms appear. If you travel to areas where Black Widows live, learn toidentify them and stay safe.
More wildlife in Maine