25 Common Butterflies Found in Montana! (ID Guide)
“What kinds of butterflies can you find in Montana?”
I love watching butterflies in my neighborhood! It’s amazing to see the incredible variety of different colors, patterns, and sizes.
There are hundreds of kinds of butterflies in Montana! Since it would be impossible to list them all in one article, I chose the most common and exciting species to share with you today. 🙂
Today, you’ll learn about 25 kinds of butterflies found in Montana.
Admirals, Queens, & Emporers
These large and brightly colored beauties are some of the most recognizable butterflies in Montana!
#1. Red Admiral
- Vanessa atalanta
- Red Admirals have a wingspan of 1.75 to 2.5 inches.
- The coloring is dark brown with a reddish circular band and white spots. The underside of the back wings looks similar to bark.
- The caterpillars are pinkish-gray to charcoal with white spots. They have spines along the back that resemble hairs.
The Red Admiral is the most widespread butterfly in Montana!
Look for this beautiful butterfly near the edge of forests in moist habitats. Red Admiral Butterflies have a unique favorite food – they love fermented fruit! If you’d like to attract them, try placing overripe cut fruit in a sunny spot in your yard.
Red Admirals are migratory butterflies. They fly south toward warmer climates in winter, and then move north again in late spring, where food is more plentiful.
If you’re looking for a butterfly in Montana that’s easy to observe, you’re in luck! Red Admirals are very calm and easy to approach and frequently land on humans!
RELATED: How to Attract Butterflies: 17 Tips!
#2. Painted Lady
- Vanessa cardui
- Painted Lady butterflies have a wingspan of 1.75 to 2.5 inches.
- The coloring is pinkish-orange, with dark brown to black markings near the wingtips and white spots inside the black markings.
- The caterpillars’ coloring is variable, ranging from greenish-yellow to charcoal. Most have light-colored spots.
Look for Painted Lady butterflies in Montana in open areas that are quiet and undisturbed, like roadsides, pastures, and gardens. This species migrates south to Mexico over winter and returns in the spring.
The population of Painted Lady butterflies can be drastically different from year to year. It’s common for them not to be seen for years in a row in some places, then suddenly show up in more significant numbers.
The Painted Lady is the only butterfly that mates year-round! Because of its constant migration pattern, it spends its entire life in suitable areas for its eggs to hatch.
- Danaus plexippus
- Monarch butterflies have a wingspan of 3.5 to 4 inches.
- Their recognizable coloring is a “stained glass” pattern of orange with black veins. White dots line the outside edge of the wings.
- Caterpillars are plump, with black, white, and yellow bands and tentacles on each end of its body.
Monarchs are easily the most recognized butterfly in Montana!
They are famous for their color pattern and migration. Look for Monarchs anywhere there is milkweed, which is the only food source their caterpillars eat.
Most people are familiar with the declining population of Monarchs. However, you might not know that this indicates an overall population decline of many other pollinating species like bees. Planting local milkweed species to attract Monarchs will also help these other species.
During migration, usually in mid-September, you may even see groups of hundreds flying south!
#4. American Lady
- Vanessa virginiensis
- American Lady Butterflies have a wingspan of 1.75 to 2.5 inches.
- The coloring of this species is a brilliant orange with dark borders and markings and white and purple spots. The underwings have an ornate pattern similar to a cobweb.
Look for American Lady butterflies in eastern Montana near open landscapes with leafy, flowering plants.
On the underside of the wings, American Lady butterflies have eyespots. These circular markings make the butterfly look intimidating to predators, warding off potential danger.
Eyespots aren’t unique to butterflies – moths, other insects, and even some fish species display this evolutionary defense strategy!
Additionally, American Lady butterflies are nervous and will often take flight at the slightest disturbance.
- Limenitis archippus
- Viceroy butterflies have a wingspan of 2.5 to 3.25 inches.
- Their coloring is deep orange with black edges and veins and white spots on the black border.
- The caterpillar is a mix of green, brown, and cream colors. It has two “horns” on its head that look like knobby antennae.
The first thing you might notice about the Viceroy butterfly is that it’s almost identical to the Monarch! The easiest way to tell them apart is to look for the black line on the bottom wing. This line is present in Viceroys, but not Monarchs.
Even though these two butterflies are similar in appearance, their caterpillars look remarkably different. Viceroy caterpillars are greenish-brown, spiny, and certainly not as beautiful as Monarch caterpillars.
I think of them as the “ugly duckling” of caterpillars, but they’re one of the prettiest butterflies in Montana!
One other key difference between these two species is that Viceroys don’t migrate. Instead, the caterpillars roll up and hibernate in leaves and emerge during the next breeding season.
#6. White Admiral
- Limenitis arthemis arthemis
- White Admiral butterflies have a wingspan of 3 to 4 inches.
- This species’ coloring is black with a bright white band on the center of the upper wings.
- Their caterpillars are mottled brown, cream, and yellow, with lumpy, angular body sections and twig-like horns.
What’s amazing about White Admirals is even though they look wildly different from Red-Spotted Purple butterflies, they’re actually the same species!
Red-Spotted Purple butterflies in the U.S. changed color to mimic another species. Since the mimic species isn’t as widespread, the White Admiral butterfly with its original coloring is still present.
Besides their appearance, almost everything about these two subspecies is similar. For example, their caterpillars use willow, aspen, and birch trees as hosts.
To attract White Admirals, try putting a cut orange or banana in a suet cage in your yard. Instead of nectar, White Admiral butterflies eat carrion, sap, and rotting fruit.
They’re most active from April to October, which is their mating season.
Crescents, Commas, and Anglewings
Named for the tiny markings on the undersides of their wings, these butterflies are known for their intricate designs.
#7. Mourning Cloak
- Nymphalis Antiopa
- Mourning Cloaks have a wingspan of 3 to 4 inches.
- The coloring is black with an iridescent sheen. A yellow border and a row of purple spots mark the outer edge of the wings.
- Caterpillars are black with white specks and a row of red spots on the back.
Mourning Cloak butterflies are most often found near deciduous forests. However, their habitat includes many developed areas like suburban yards, parks, and golf courses.
You might have a hard time finding this butterfly in Montana.
Even though it’s fairly widespread, its preference for cold weather and solitary habits make it hard to spot even for an avid butterfly enthusiast! In addition, it’s so well-camouflaged when its wings are folded that you might miss one right in front of you.
Mourning Cloaks are often the first butterflies to become active in the spring! In fact, some adults are even active through winter on warm days, when snow is still on the ground.
They’re also one of the longest-lived butterflies around, with some individuals living up to ten months!
#8. Pearl Crescent
- Phyciodes tharos
- Pearl Crescent butterflies have a wingspan of 1.25 to 1.75 inches.
- Their coloring is bright orange with black borders, spots, and lines. The pattern created by the black markings is similar to lace.
- Caterpillars are dark brown with cream stripes and spines all over their bodies.
Look for Pearl Crescent butterflies in northeastern Montana near moist ground.
They prefer open, sunny habitats but many locations suit their needs, including forest edges, fields, meadows, and gardens.
The Pearl Crescent caterpillar’s preferred host is the Aster plant. Any flowering plants in your yard will attract this beautiful butterfly, but for best results, try to find one that’s native to your area.
When the caterpillars grow into butterflies, they will feed on the nectar of the Asters as well!
#9. Question Mark
- Question Mark butterflies have a wingspan of 2.25 to 3 inches.
- Their coloring is deep orange with black spots and a lavender edge.
- Caterpillars are gray to black with spines on the side and orange and cream stripes.
Look for Question Mark butterflies in moist woodland and forest edges. Their caterpillars’ preferred host plants are elm trees and nettle, so you’re most likely to see this species in areas with elm forests or thickets of nettle, or both.
Question Marks feature bright coloring on the upper side of their wings, but the lower side is mottled brown. This coloring helps to camouflage the butterflies, making them resemble a dead leaf while resting on branches.
Their name comes from a slight, light-colored marking on the underside of the wing. It takes some imagination, but this marking sort of looks like a roughly drawn question mark!
#10. Eastern Comma
- Eastern Comma butterflies have a wingspan of 2 to 2.5 inches.
- Coloring is orange with black mottling on the upper wings and primarily black with some orange spots on the lower wings.
- Caterpillars are black or greenish with a white stripe down the sides and white spines.
Eastern Comma butterflies live in deciduous forests, suburban yards, and parks.
Nettle and Elm Trees are the preferred hosts for their caterpillars. Adults are not attracted to flowers but instead feed on rotting fruit, carrion, and animal dung. So this most likely isn’t a species you’d want to attract to your yard! 🙂
However, they’re very prevalent, and your chance of seeing one is good.
Interestingly, Eastern Commas hibernate as adults instead of as caterpillars. During winter, they find shelter in log piles, tree hollows, and even some human-made shelters. Their mating season is early spring, and new generations of butterflies become active in early summer.
Fritillaries are some of the most abundant butterflies in Montana. They have a checkerboard type pattern and are usually shades of orange and black.
#11. Variegated Fritillary
- Variegated Fritillary butterflies have a wingspan of 1.75 to 2.25 inches.
- The coloring of this species is tawny brown to burnt orange with black dots and lines. The outer edge of the wings is also lined in black.
- Caterpillars are reddish-orange, with white stripes that run the length of the body and black spines.
Look for these butterflies in eastern Montana in meadows, open lots, and fields.
Plant flowers like butterfly weed, mint, and sunflowers to attract them to your garden. Ornamental plants like violets, pansies, and passionflower serve as hosts for their caterpillars.
The Variegated Fritillary’s chrysalis is one of the most beautiful of all the butterflies in Montana. This protective shell is where the caterpillar transforms into the adult butterfly. Its pearly white color and shiny gold spikes make it look like an expensive jeweled pendant!
#12. Great Spangled Fritillary
- Great Spangled Fritillary butterflies have a wingspan of 2.5 to 3.5 inches.
- Their coloring is orange with black lines and dots that form a web-like pattern on their wings. In addition, the undersides of their wings have silvery white dots outlined in black.
The Great Spangled Fritillary is one of many butterflies in Montana that prefers open, sunny areas like pastures and meadows.
It’s not uncommon to see hundreds of them in large milkweed or violet fields!
This species doesn’t migrate; instead, its caterpillars hibernate over winter and emerge in the spring. That happens around the same time as the new growth on their host violet plants appears.
Interestingly, male Great Spangled Fritillaries die weeks before females, right after mating. The females then feed for another two to three weeks and lay eggs before also dying off.
#13. Aphrodite Fritillary
- Aphrodite Fritillary butterflies have a wingspan of 2 to 3 inches.
- Their coloring is bright yellow-orange with a network of black webbing and dots. On the underside of the wings, there are black-ringed blueish-white dots as well.
Look for Aphrodite Fritillaries in meadows, fields, and pastures in southeastern Montana.
The caterpillar’s host plant is violets, so any plantings of this flower will attract adult Aphrodite Fritillaries. They lay eggs on the ground near violet plants, and when the eggs hatch, the caterpillars crawl to the violets to hibernate.
Many flowers in a typical butterfly garden will also attract adult Aphrodite Fritillaries. Try planing milkweed, butterfly weed, thistles, or goldenrod if you’d like to see more of this species.
#14. Meadow Fritillary
- Meadow Fritillary butterflies have a wingspan of 1.5 to 2 inches.
- Their coloring is yellow-orange with dusky black splotches. The underside of their wings is muted in color and looks like a dead leaf, which is used for camouflage.
Meadow Fritillary butterflies in Montana have the scientific name Boloria bellona, which is in the brush-foot family. That’s sometimes confusing since a European butterfly has the same name, but the two species are only distantly related!
Our Meadow Fritillaries are active throughout the summer and very common in their range, so this is an excellent butterfly to attract to your garden.
Aster flowers like Black-eyed Susans, daisies, and sunflowers are popular picks to attract them.
#15. Silver-Bordered Fritillary
- Silver-Bordered Fritillaries have a wingspan of 1.6 to 2.1 inches.
- Their coloring is bright orange with irregular black markings. The wings have a thin white edge and a thick black border with orange dots inside. The underside of the wing has metallic, silvery dots along the edge, which is how this species got its name.
Silver-Bordered Fritillaries are small, rare butterflies in Montana.
Their preferred habitat is wet grassland, which is often turned into agricultural fields. This habitat disruption has caused a decline in the population of the Silver-Bordered Fritillary.
Despite these challenges, you can still attract Silver-Bordered Fritillaries to your garden by planting violets for their caterpillars or thistle as a nectar flower.
They typically fly low to the ground in jerky, fast movements, so keep your eyes on the grass and look out for streaks of orange!
Satyrs & Snouts
Satyr butterflies prefer cool, shady areas with less sunlight than other butterflies in Montana. There are estimated to be over 2,400 distinct species!
#16. Common Wood-Nymph
- Cercyonis pegala
- Common Wood-Nymphs have a wingspan of 2 to 3 inches.
- Coloring can vary greatly, but generally, this species is shades of brown with dark eyespots.
- Caterpillars are yellow-green with dark green stripes and white hairs.
Common Wood-Nymphs are found in many different habitats, including open forests, meadows, agricultural fields, and salt marshes. Their caterpillars hatch late in fall and hibernate through the winter.
Look for this species in late summer and early fall since it’s most active this time of year.
Adult Common Wood-Nymphs occasionally eat flower nectar but prefer to feed on rotting fruit or decaying plants.
This is one of few species whose host plant (which the caterpillar eats) is grass. Kentucky Bluegrass, one of its favorites, is also a popular lawn grass. So, you may not even need to plant anything new to attract this species!
These brightly colored, delicate-looking butterflies in Montana are some of the prettiest to look at!
- Celastrina ladon
- Azure Butterflies have a wingspan of 0.75 to 1.25 inches.
- Their coloring is dusky gray to cornflower blue, with spots and stripes in shades of gray. Females of this species tend to be darker and less colorful.
Azure butterflies in Montana are found in open woodlands, forest edges, roadsides, and hiking trails.
They’re one of the most widely-seen species in our area and very abundant within their range.
It’s common to see Azure butterflies before spring flowers are even in bloom! Azures are part of the Gossamer-Winged butterfly family, which gets its name from their wings’ fringed, fabric-like texture.
Three additional Azures have recently been given species status:
- Summer Azure, Celastrina neglecta, is usually found later in the year and has more vibrant coloring than its early cousin.
- Appalachian Azure, Celastrina neglectamajor, has a smaller range but is the largest Azure butterfly.
- Dusky Asure, Celastrina nigra, is the least vibrant, often with no blue or ashen gray-blue wings.
#18. Eastern Tailed-Blue
- Eastern Tailed-Blue butterflies have a wingspan of 0.75 to 1 inch.
- Males and females have very different coloring on their upper wings. Males are brilliant blue with a brown border and white edges, and females are grayish-brown with white edges. Both sexes have one or two small orange spots above the wing tails.
Look for Eastern Tailed-Blue butterflies in western Montana in vacant lots, pastures, and home gardens.
They’re one of our most abundant species and easily attracted to flowers.
The easiest way to identify Eastern Tailed-Blues is by their hair-like tails on each of the hind wings. But, these often break off, so you may find some individuals without tails.
The silvery-blue color of the underside of their wings is another good sign that you’ve found an Eastern Tailed-Blue.
#19. Gray Hairstreak
- Gray Hairstreak butterflies have a wingspan of 1 to 1.5 inches.
- Their coloring is slate gray with a single bright orange spot on each lower wing. Below, their wings are light gray with a black and white stripe.
Look for Gray Hairstreak butterflies in open areas like roadsides, unused pasture, and rural meadows. Their caterpillars use many plants as hosts, so they’re common across many different habitats.
Gray Hairstreaks are one of a few butterflies in Montana with thin, long wing tails that resemble hairs.
This adaptation is a defensive strategy that draws predators away from the butterfly’s body. By mimicking a head with antennae and using its eyespots as a distraction, Gray Hairstreaks give themselves time to escape!
#20. Coral Hairstreak
- Coral Hairstreaks have a wingspan of 0.9 to 1.25 inches.
- Their coloring is light grayish-brown with an outer row of coral spots ringed in black. They also have a second row of smaller black spots ringed in white.
You’re unlikely to mistake a Coral Hairstreak with any other butterfly in Montana!
Its coloring, both on the wings and its body, makes it unique among small butterflies.
Coral Hairstreaks prefer brushy fields and woodland edges with plenty of dense shrubs. Adults are especially attracted to milkweed blossoms for their nectar and as a place to perch.
Coral Hairstreak caterpillars use wild cherry and American plum trees as their hosts and feed on the fruits of these trees.
#21. Banded Hairstreak
- Banded Hairstreak butterflies have a wingspan of 1 to 1.25 inches.
- Their coloring varies from brown to slate gray. In addition, they have black-bordered red dots along the outer edge of the wings, white stripes, and a blue patch near the wing tails.
Look for Banded Hairstreak butterflies in forested areas or sunny clearings near woods. Adult butterflies are drawn to nectar plants, so it should be pretty easy to attract this species if you live near a wooded area.
Planting dogbane or meadowsweet will help you have more sightings.
Adults are active for about four weeks in early summer, and they mate a single time during this active season. The eggs survive through summer, fall, and winter and hatch into caterpillars in the spring.
The caterpillars feed on oak, walnut, and hickory trees. Therefore, any area with these species is an excellent place to spot the Banded Hairstreak!
Whites & Sulphurs
These small, unpatterned butterflies are common in Montana and often the first sign that spring has arrived.
#22. Cabbage White
- Pieris rapae
- Cabbage White Butterflies have a wingspan of 1.25 to 2 inches.
- The wings are light greenish to white, with black wing tips and black dots in the center of each wing. Males have one black dot on each side, and females have two.
- Caterpillars, sometimes called Cabbage Worms, are dark green with a light green stripe along the back.
Cabbage White butterflies are well-suited to almost any habitat in Montana.
The only areas they avoid are dense forests with little room to fly. You can even see this species if you live in the city since they often live in very large metropolitan areas!
Look for Cabbage Whites in the summer, when they are most active and breeding. Their caterpillars, sometimes called Cabbage Worms, are a pest because they often overtake and eat cabbage, kale, nasturtium, and other brassica plants.
If you have a vegetable garden and see Cabbage Whites, you should pay extra attention to your plants to ensure these hungry insects don’t ruin them! In fact, Cabbage White butterflies are invasive in Montana. This non-native species was transported here through the food and agricultural trade.
Since it’s so well-suited to our climate, its population has exploded and it’s now considered one of the most damaging invasive species to crops.
#23. Orange Sulphur
- Colias eurytheme
- Orange Sulphur Butterflies have a wingspan of 1.5 to 2.5 inches.
- Their coloring is bright yellow-orange with black borders on the wings and irregular black spots.
Look for Orange Sulfur butterflies in Montana along sunny roadsides, meadows, and gardens.
Its preferred food and host plant is Alfalfa, which is how it got the nickname “Alfalfa butterfly”.
The easiest way to recognize an Orange Sulphur is by its flight pattern. They have an erratic, jerky flying style and usually stay low to the ground.
You’re likely to see this abundant and widespread species in urban and suburban environments during the spring and summer.
#24. Clouded Sulphur
- Colias philodice
- Clouded Sulphur butterflies have a wingspan of 1.75 to 2.75 inches.
- This species has two color forms, one white with a light green cast, and one yellow. Both morphs have a red-ringed eyespot and pinkish borders on the wings.
Clouded Sulphurs are some of the most common butterflies in Montana!
This is because they’re prolific breeders and are at home in almost any habitat.
Look for them along roadsides, parks, and home gardens. They are often found in the same area as their closely related cousins, the Orange Sulphur. However, the erratic, jerky flight style of Orange Sulphurs set them apart from most other butterfly species. To properly identify a Clouded Sulphur, look for a “wobbly” flying butterfly.
There are two distinct morphs of the Clouded Sulphur. The white morph is primarily white with a greenish tint, and the yellow morph is almost entirely yellow. Interestingly, ONLY females display the white color morph, and males are always yellow.
#25. Little Sulphur
- Little Sulphur butterflies have a wingspan of 1 to 1.5 inches.
- The coloring is bright yellow with a black border or wing tip in males. Females have pale yellow wings with dark speckles and blotches.
- Caterpillars are deep green with a thin cream stripe on each side.
Look for Little Sulphurs in disturbed open areas like roadsides, vacant lots, and hiking trails. They’re also known as Little Yellows for their small size and bright yellow wings.
To attract them, try planting a local variety of aster whose nectar this species loves! Their caterpillars use the partridge pea as a host plant, so it’s a welcome addition to any butterfly garden.
Like many butterflies in Montana, Little Sulphurs can be found year-round in warm climates. Further north, look for this butterfly from late June to early October.
Do you need more help identifying butterflies in Montana?
Try this field guide!
Which of these butterflies have you seen in Montana?
Leave a comment below!
If you enjoy this article, make sure to check out these other guides!
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18 Types of SPIDERS in Montana!
9 Kinds of SNAKES That Live in Montana! (Includes venomous species)