21 Types of Ladybugs in Montana
Yes, Montana hosts eight species of ladybugs that appear regularly in sightings throughout the state, with the Asian Lady Beetle, Seven-spotted Lady Beetle, and Transverse Lady Beetle accounting for the majority of observations. All of these species are beneficial predators that feed on aphids and other soft-bodied insects, making them welcome visitors in gardens and agricultural areas. Peak sightings occur from May through July when weather warms and vegetation supports their prey. The species range from a quarter-inch to just over half an inch long, and identification depends on checking the number and arrangement of spots on the wing covers, the shape of the pronotum, and coloration patterns.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 2, 2026.
- 8
- species recorded
- June, July, May
- peak months
Verified species, source iNaturalist
21 types of ladybugs recorded in Montana
21 ladybug species have a verified observation record in Montana, each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.
2 of the 21 shown are recorded as introduced to Montana rather than native.
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Also recorded in Montana
| # | Species | Scientific name | Records |
|---|---|---|---|
| 13 | Oregon Lady BeetleHippodamia oregonensis | Hippodamia oregonensis | 19 |
| 14 | Nine-spotted Lady BeetleCoccinella novemnotata | Coccinella novemnotata | 18 |
| 15 | Broken-dashed Lady BeetleMyzia interrupta | Myzia interrupta | 18 |
| 16 | Parenthesis Lady BeetleHippodamia parenthesis | Hippodamia parenthesis | 17 |
| 17 | Fifteen-spotted Lady BeetleAnatis labiculata | Anatis labiculata | 14 |
| 18 | Western Polished Lady BeetleCycloneda polita | Cycloneda polita | 13 |
| 19 | Mountain Lady BeetleCoccinella monticola | Coccinella monticola | 11 |
| 20 | Thirteen-spotted Lady BeetleHippodamia tredecimpunctata | Hippodamia tredecimpunctata | 11 |
| 21 | Twice-stabbed Lady BeetleChilocorus stigma | Chilocorus stigma | 10 |
Plus 21 more recorded only rarely (fewer than 10 verified sightings). Counts from verified iNaturalist observations. Photos by iNaturalist observers, reused under the licence each observer chose.
More on ladybugs in Montana:
Real sighting data, source iNaturalist
1,814 verified observations on iNaturalist of ladybug have been recorded in Montana, most often in June, July, May.
When ladybug are recorded in Montana
Yes, Montana hosts eight species of ladybugs that appear regularly in sightings throughout the state, with the Asian Lady Beetle, Seven-spotted Lady Beetle, and Transverse Lady Beetle accounting for the majority of observations. All of these species are beneficial predators that feed on aphids and other soft-bodied insects, making them welcome visitors in gardens and agricultural areas. Peak sightings occur from May through July when weather warms and vegetation supports their prey. The species range from a quarter-inch to just over half an inch long, and identification depends on checking the number and arrangement of spots on the wing covers, the shape of the pronotum, and coloration patterns.
How do you tell ladybug species apart by their appearance?
Each ladybug species has distinctive markings. The most reliable identification feature is the pattern of spots on the wing covers (called elytra). The Asian Lady Beetle is typically red-orange with up to 15 black spots, though spotless individuals also occur. The Seven-spotted Lady Beetle has exactly seven black spots on a bright red background and a white pronotum with a central black spot resembling an 'M' mark. The Transverse Lady Beetle displays a burnt orange color with fewer, larger spots that often merge into transverse bands. The Convergent Lady Beetle is orange-red with a light-colored pronotum marked with two dark spots. Color alone is unreliable since even closely related species vary, so always check spot count and arrangement first.
Asian Lady Beetle (most common in Montana)
The Asian Lady Beetle is the dominant species in Montana observations with 364 recorded sightings. This species ranges from pale yellow to deep red-orange, with spot counts varying from zero to 15 per wing cover. It has a white pronotum with dark markings. Originally introduced to North America for aphid control in agriculture, the Asian Lady Beetle thrives in Montana's grasslands and crop areas. These beetles are highly predatory and can consume 40 or more aphids daily. They emerge in late April and May across the state and remain active through September, overwintering in sheltered locations like bark crevices and building eaves. Their willingness to eat a broad range of soft-bodied pests makes them valuable for natural pest management.
Seven-spotted Lady Beetle
Montana recordings show 288 observations of the Seven-spotted Lady Beetle, the second most abundant species in the state. This species is unmistakable with its bright red wing covers, each bearing exactly seven black spots arranged in a distinctive pattern. The pronotum is white with a bold black 'M' or 'W' shaped marking. Adult size ranges from 0.3 to 0.8 inches. This beetle prefers moderate climates and avoids extreme heat, so Montana's cooler valleys suit its life cycle well. Peak activity occurs in May through July. Seven-spotted Lady Beetles feed primarily on aphids and also consume small mites and soft insects. They overwinter as adults in protected spots and emerge in spring to lay eggs on plants with high aphid populations.
Transverse Lady Beetle identification and behavior
The Transverse Lady Beetle accounts for 201 sightings in Montana and is named for the transverse (sideways) bands of color on its wing covers. Its base color ranges from red to burnt orange with black spots or bands running across the elytra. The pronotum is typically yellow-orange with minimal dark marking. Adults measure 0.25 to 0.4 inches, making them among the smaller ladybug species. This beetle prefers woody habitats and is frequently found on shrubs and trees rather than herbaceous plants. Like other ladybugs, it preys heavily on aphids but also feeds on scale insects and spider mites. In Montana, the Transverse Lady Beetle becomes active in April and continues through October, with peak numbers in May and June. It tolerates cooler temperatures better than some tropical or subtropical species.
What are the smaller ladybug species found in Montana?
Montana hosts several less abundant but present species of smaller ladybugs. The Flying Saucer Lady Beetle (97 sightings) is notably flattened and disc-shaped with a dull appearance, measuring around 0.25 inches. The Two-spotted Lady Beetle (70 sightings) is black with two red or orange spots on its elytra. Casey's Lady Beetle (59 sightings) is similarly small with distinctive spot patterns. The Painted Lady Beetle (44 sightings) has colored or textured elytra. These species are less conspicuous than the large red species but equally important as aphid predators. They prefer specific host plants and microhabitats within Montana's diverse ecosystems. Summer observers in forests, gardens, and agricultural areas may encounter all of these species, especially during the peak months of May through July.
Convergent Lady Beetle
The Convergent Lady Beetle appears in 174 recorded Montana observations and is named for the two white lines that converge on the pronotum. This species is orange-red to scarlet with six to 12 black spots on each wing cover. The distinctive convergent white lines on the pronotum make identification straightforward. Adults typically reach 0.25 to 0.4 inches in length. This beetle is highly adaptable and occurs across a wide range of habitats in Montana from grasslands to open woodlands. The Convergent Lady Beetle is an aggressive predator of aphids, scales, and mites and has been used for commercial aphid control. In Montana, populations peak during May through July. These beetles migrate seasonally and may gather in large numbers at high elevations in late summer as they prepare for overwintering.
Where do Montana's different ladybug species live and feed?
Ladybug species in Montana distribute across diverse habitats based on food availability and vegetation type. The Asian Lady Beetle and Convergent Lady Beetle tolerate agricultural areas and thrive in crop fields with aphid infestations. The Seven-spotted Lady Beetle prefers mixed gardens and herbaceous plants with diverse prey. The Transverse Lady Beetle favors shrubland and open forest edges where it hunts on woody plants. Smaller species like the Flying Saucer and Painted Lady Beetles occupy understory layers and ground-level vegetation. Meadows, agricultural areas, riparian zones, and forest margins all support different species assemblages. All species require areas with adequate food such as aphids or other small insects. In Montana, the best locations to find active ladybugs are areas with plants stressed by pest infestations, since this supports dense prey populations that attract feeding beetles.
When in Montana do you see the most ladybugs?
Montana's ladybug activity follows a clear seasonal pattern with peak observations from May through July. June and July are the most productive months, with 460 and 417 iNaturalist sightings respectively. May is also busy with 273 observations. This timing aligns with warm weather and the peak flight activity of aphids and other prey. Spring emergence in April (119 sightings) marks the beginning of the active season as overwintered adults feed and reproduce. Activity drops sharply in fall and winter, with only 6 to 11 sightings recorded in January, February, November, and December. The coolest months see ladybugs in dormancy within protected sites. For the best chance to observe Montana's ladybug diversity and behavior, plan field time from mid-May through late July when weather is warmest and beetle abundance is highest.
Frequently asked questions
How do you tell ladybug species apart by their appearance?+
Each ladybug species has distinctive markings. The most reliable identification feature is the pattern of spots on the wing covers (called elytra). The Asian Lady Beetle is typically red-orange with up to 15 black spots, though spotless individuals also occur. The Seven-spotted Lady Beetle has exactly seven black spots on a bright red background and a white pronotum with a central black spot resembling an 'M' mark. The Transverse Lady Beetle displays a burnt orange color with fewer, larger spots that often merge into transverse bands. The Convergent Lady Beetle is orange-red with a light-colored pronotum marked with two dark spots. Color alone is unreliable since even closely related species vary, so always check spot count and arrangement first.
What are the smaller ladybug species found in Montana?+
Montana hosts several less abundant but present species of smaller ladybugs. The Flying Saucer Lady Beetle (97 sightings) is notably flattened and disc-shaped with a dull appearance, measuring around 0.25 inches. The Two-spotted Lady Beetle (70 sightings) is black with two red or orange spots on its elytra. Casey's Lady Beetle (59 sightings) is similarly small with distinctive spot patterns. The Painted Lady Beetle (44 sightings) has colored or textured elytra. These species are less conspicuous than the large red species but equally important as aphid predators. They prefer specific host plants and microhabitats within Montana's diverse ecosystems. Summer observers in forests, gardens, and agricultural areas may encounter all of these species, especially during the peak months of May through July.
Where do Montana's different ladybug species live and feed?+
Ladybug species in Montana distribute across diverse habitats based on food availability and vegetation type. The Asian Lady Beetle and Convergent Lady Beetle tolerate agricultural areas and thrive in crop fields with aphid infestations. The Seven-spotted Lady Beetle prefers mixed gardens and herbaceous plants with diverse prey. The Transverse Lady Beetle favors shrubland and open forest edges where it hunts on woody plants. Smaller species like the Flying Saucer and Painted Lady Beetles occupy understory layers and ground-level vegetation. Meadows, agricultural areas, riparian zones, and forest margins all support different species assemblages. All species require areas with adequate food such as aphids or other small insects. In Montana, the best locations to find active ladybugs are areas with plants stressed by pest infestations, since this supports dense prey populations that attract feeding beetles.
When in Montana do you see the most ladybugs?+
Montana's ladybug activity follows a clear seasonal pattern with peak observations from May through July. June and July are the most productive months, with 460 and 417 iNaturalist sightings respectively. May is also busy with 273 observations. This timing aligns with warm weather and the peak flight activity of aphids and other prey. Spring emergence in April (119 sightings) marks the beginning of the active season as overwintered adults feed and reproduce. Activity drops sharply in fall and winter, with only 6 to 11 sightings recorded in January, February, November, and December. The coolest months see ladybugs in dormancy within protected sites. For the best chance to observe Montana's ladybug diversity and behavior, plan field time from mid-May through late July when weather is warmest and beetle abundance is highest.
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Common questions about ladybugs