Are There Bold Jumping Spiders in Montana?

Bold jumping spiders are uncommon in Montana compared to eastern states, but they do occur in lower elevation valleys and grassland regions. These small, fuzzy spiders with distinctive triangular spots prefer warmer locations and lower elevations. Bold jumping spiders are rare or absent in Montana's mountains and high elevations due to cold climate.

By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 20, 2026.

Bold Jumping Spider photographed in Montana — Photos by iNaturalist observers, reused under the licence each observer chose.

Found in Montana

1
species recorded: 85
GBIF records: May, June, September
peak months

Yes, bold jumping spiders are in Montana. Next you'll want:

Real sighting data, source iNaturalist

111 verified observations on iNaturalist of bold jumping spider have been recorded in Montana, most often in May, June, September.

When bold jumping spider are recorded in Montana

Where Bold Jumping Spiders Are Found in Montana

Bold jumping spiders are less common in Montana compared to eastern and central United States, but they do occur in specific regions and habitats. Eastern Montana east of the Rocky Mountains provides the best habitat, with populations concentrated in lower elevation areas with grasslands and agricultural land. Around Miles City, Glendive, and other eastern towns, bold jumping spiders are more regularly encountered. The Missouri River breaks region in central-eastern Montana provides habitat in canyons and riparian zones. Central Montana valleys including the Gallatin Valley near Bozeman and surrounding areas support populations in warmer locations. Missoula and surrounding valleys in western Montana may harbor populations in favorable microclimates. Western Montana's mountains are less suitable due to higher elevations and cooler climate. They are uncommon to rare in the mountains of western Montana including areas around Kalispell. Northern Montana's prairie and grassland areas provide habitat in lower elevation regions. Southern Montana valleys and lower elevations host populations more readily than high mountains. Urban and suburban areas including Billings, Bozeman, Missoula, and Great Falls may support populations in yards and gardens in warmer locations. Agricultural areas in eastern and central Montana provide habitat along field edges and in open areas. State parks and natural areas in lower elevation regions may host populations. Bold jumping spiders are far less abundant in Montana than in eastern states. For information about Montana wildlife,visit the state wildlife hub.Visit the Montana wildlife guide.

Seasonal Timeline in Montana

Bold jumping spiders have a compressed seasonal timeline in Montana due to the cool climate and short growing season. They become active in June and July as temperatures warm sufficiently. Peak activity occurs in July and August when temperatures are warmest and insects are most abundant. By September, activity begins declining. Females lay eggs in September and October in protected locations. These egg sacs must survive Montana's harsh winters with extended periods of extreme cold and heavy snow. Winter is long and severe with temperatures dropping far below freezing for months at a time. No spider activity occurs from November through May in all but the most favorable locations. Spring arrives slowly with cool temperatures persisting through May. June brings warmth and the return of spider activity. Seasonal variation is dramatic with active spiders visible only during summer and fall, and complete absence from late fall through spring. Weather variations from year to year affect exact timing, with cold summers delaying emergence and warm summers advancing it. For wildlife information, visit/wildlife.

Identifying Bold Jumping Spiders

Bold jumping spiders are small and distinctive, making them relatively easy to identify when encountered in Montana. Adults measure 8 to 15 millimeters in length. The body is entirely fuzzy and black in color. The white or orange triangular marking on the abdomen is the most recognizable feature and is always present. This mark is highly diagnostic. The iridescent green chelicerae, the jaw structures near the mouth, appear bright green and glowing in good light. These distinctive green mouthparts are unique among Montana spiders. The eyes are large and forward-facing, reflecting jumping spider family's superior vision. The body posture is typically upright and alert. Males are often slightly smaller and more vibrantly colored than females. The legs are relatively short compared to body size. Some individuals show more orange on the abdominal marking while others display more white. The fuzzy body texture is distinctive. Close observation allows reliable identification. The combination of small size, black fuzzy body, triangular abdominal marking, and green jawparts uniquely identifies bold jumping spiders. To learn more about Montana wildlife,visit the wildlife guide.Visit the Montana wildlife guide.

Favorable Habitats and Locations

Bold jumping spiders in Montana concentrate in specific microhabitats where conditions favor hunting and survival. Gardens and yards in lower elevation towns are reliable places to find them. Ornamental plants and flowering shrubs attract spiders and their prey. Field edges where grassland meets trees or brush provide ideal habitat in eastern and central Montana. Wooden structures including buildings, fences, and posts in warmer locations harbor spiders. Tree bark on sun-facing sides of trees in sheltered locations provides hunting ground. Valley floors and lower elevation areas are far more productive than high elevation or exposed ridge areas. Grasslands and prairie-like habitats in eastern Montana support populations. Riparian zones along streams and rivers in protected valleys provide habitat. Agricultural areas in eastern and central Montana including crop edges and field margins concentrate populations. Roadsides in lower elevation valleys with vegetation can be productive. Open, sunny areas are strongly preferred over shaded or exposed locations. Urban and suburban areas in Billings, Bozeman, Missoula, and other lower elevation towns support populations in gardens and yards. State parks in lower valleys may host populations. For more Montana wildlife information,explore the state guide.Visit the Montana wildlife guide.

Hunting Behavior and Diet

Bold jumping spiders are day-active hunters with exceptional vision and hunting ability. Unlike web-building spiders, they stalk insects using visual tracking. When hunting, spiders move slowly and deliberately, pausing to observe with their large forward-facing eyes. Once prey is within striking distance, they launch with powerful hind legs, covering several body lengths through air. This pouncing strategy allows them to capture flying insects. In Montana, they hunt flies, gnats, mosquitoes, small moths, small wasps, and other small arthropods. Males are more active than females, particularly during the brief mating season. Males perform courtship displays involving leg waving and body vibrations. Females are more sedentary. Both sexes bask on sunny days. At night and during cool weather, spiders retreat to protected locations. They do not create webs but use natural cavities and sheltered spots. Bold jumping spiders are generally gentle and curious about humans. Visit/wildlifeto learn about other Montana animals.

Safety and Harmlessness

Bold jumping spiders are absolutely harmless to people, pets, and property in Montana. They are not aggressive and do not bite unless roughly handled. Even if bitten, their fangs cannot pierce skin. Many keep them as pets because they are docile and safe. There are no legal protections as they are common, though rarely encountered. They cause no building damage and do not infest homes. If a spider enters a building, it hunts small insects. Removing one is simple: gently guide onto paper and release outside. Killing them is unnecessary. In gardens and yards, they benefit by eating pest insects. They consume mosquitoes, flies, and wasps. Their presence supports healthy pest control. Children can safely observe them under adult supervision. No protective equipment is needed. Bold jumping spiders are strong enough to survive gentle handling but require care not to crush. For comprehensive information about Montana wildlife safety,consult the state wildlife resources.

Similar Spider Species

Several other jumping spider species in Montana could be confused with bold jumping spiders. The regal jumping spider is larger, up to 20 millimeters, with more complex coloring. Regals have different facial structure. The zebra jumping spider has white stripes across the abdomen instead of a triangular spot. Wolf spiders are much larger with different structure and behavior. They are more common in Montana than bold jumping spiders and are often misidentified as jumping spiders. Lynx spiders have different body configuration and hunting behavior. Ground spiders and small hunting spiders might be mistaken for jumping spiders but lack the characteristic large forward-facing eyes. The unique combination of small size, fuzzy black body, white or orange triangular abdominal marking, and iridescent green mouthparts identifies bold jumping spiders. Observation reliably separates them from similar species. To learn more about Montana spiders,visit the wildlife guideUnderstanding and appreciating these spiders enhances our connection to local ecosystems.Find more about Montana wildlife.

Frequently Asked Questions

What is the lifespan of a bold jumping spider in Montana? Bold jumping spiders in Montana live about one year from hatching to death, though the active season is much shorter than in eastern states. Eggs laid in fall are dormant over Montana's harsh winter and hatch in spring. Spiders grow during the brief spring and summer and breed in fall before dying. Are bold jumping spiders found in Montana mountains? Bold jumping spiders are rare in Montana's mountain regions due to elevation, cold, and short growing season. They are far more common in lower elevation valleys and eastern grassland areas. Can I keep a bold jumping spider as a pet in Montana? Yes, bold jumping spiders make good pets and are legal to keep in Montana. They are fascinating to observe and require minimal care with a small container, surfaces to climb, water, and occasional live insects. What insects do they eat in Montana? Bold jumping spiders eat many small insects including flies, gnats, mosquitoes, and small wasps. In Montana's shorter season, they help control insect populations during summer and early fall. They are uncommon residents of Montana with populations concentrated in lower elevation valleys.

Plan your trip

Best time to see bold jumping spider in Montana: May, June, September

See the month-by-month sighting calendar.

When to go

Plan your bold jumping spider sighting in Montana

85 verified bold jumping spider records have been logged in Montana, most recently in 2026. See the GBIF records.

Where to look in Montana

Big Hole National Battlefield · Wildlife Watching, Birdwatching · Find hotels
Bighorn Canyon National Recreation Area · Wildlife Watching, Birdwatching · Find hotels
Grant-Kohrs Ranch National Historic Site · Wildlife Watching, Birdwatching · Find hotels
Lewis & Clark National Historic Trail · Wildlife Watching · Find hotels
Nez Perce National Historical Park · Wildlife Watching, Birdwatching · Find hotels
Yellowstone National Park · Wildlife Watching, Birdwatching · Find hotels

Planning a trip to see bold jumping spider? Find places to stay near Big Hole National Battlefield on Booking.com.

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