Red Admiral Butterflies in Connecticut: A Look at the Brush-Footed Family
October 10, 2026
A Red Admiral will land on a hiker’s shoulder, sit for a full minute, and then dart off to chase away a rival male twice its speed. That kind of bold, almost social behavior sets this species apart from most other butterflies in Connecticut, and it’s one reason backyard naturalists across the state keep an eye out for its dark, red-banded wings every spring.
The Red Admiral also happens to belong to the largest butterfly family found in the state: the brush-footed butterflies, or Nymphalidae. Understanding how this one species fits into that broader family explains a lot about why Connecticut’s fields, forest edges, and gardens look the way they do from April through October.
Red Admiral
The Red Admiral (Vanessa atalanta) is a medium-sized butterfly with black wings crossed by bold red-orange bands and dotted with white spots near the tips. It has a wingspan of about 2 inches, and it was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. The underside of the wings is a duller, bark-like brown and gray, which gives the butterfly effective camouflage the moment it folds its wings shut. This muted underside provides effective camouflage when the butterfly is at rest.
Males are famously territorial, and this is where the species gets interesting to watch. Male Red Admirals generally claim an elliptically shaped area ranging between roughly 4-13 meters wide and 8-24 meters long, and they patrol those boundaries up to thirty times an hour to keep rivals out. When an intruder shows up, the resident male tries to drive it away by out-flying and out-maneuvering it, and Red Admirals are known for being fidgety, swift insects that rapidly change direction mid-flight.
Territory matters for more than just bragging rights. Females will only mate with males that successfully hold territory, so only the strongest fliers get the chance to court a partner. Males patrol their claimed ground seven to thirty times per hour to keep it defended, a routine that plays out in sunny clearings along forest edges throughout the warmer months.
Despite all that aggression toward other butterflies, Red Admirals have a reputation for being unusually calm around people. They are considered people-friendly butterflies that will approach and perch on human beings without much hesitation.
Pro Tip: Red Admirals rarely visit flowers when better food is around. Adults prefer to feed at sap flows on trees, fermenting fruit, and even bird droppings, only turning to nectar sources like aster, red clover, and lilac when those options aren’t available. Leave a few overripe apples or peaches in a sunny corner of the yard and there’s a good chance one will show up within a day or two.
Caterpillars have a much narrower diet. The primary host plant is stinging nettle, though the caterpillars can also be found feeding on false nettle. Females lay their eggs one at a time on the tops of host plant leaves, and the caterpillars build a shelter out of folded leaves tied together with silk, passing through five instars before pupating. That habit of hiding inside a rolled leaf makes the caterpillar stage far harder to spot in the wild than the adult butterfly.
Migration adds another layer to the Red Admiral’s story. They fly south toward warmer climates in winter and then move back north again in late spring, when food becomes more plentiful. Anyone hoping to find this species should focus their search near the edge of a wooded area with damp soil, since this butterfly favors the edge of forests in moist habitats over open meadows.
Readers curious about which other creatures share that same forest-edge habitat can check the broader rundown of wild animals living in Connecticut for context on what else to expect on the trail. The bold red-and-black pattern isn’t just for show, either. It functions as a warning to predators, and readers interested in exactly which animals attempt to eat butterflies despite that warning coloration can find more detail in this breakdown of animals that eat butterflies.
Brush-Footed Butterflies
The Red Admiral is only one member of a much larger group. Brush-footed butterflies belong to the family Nymphalidae, named for the tiny, brush-like hairs on their reduced front legs, and this family makes up the bulk of the butterflies in Connecticut that most people actually notice in their yards.
Connecticut hosts a wide variety of brush-footed butterflies, with documented species including the Monarch, Mourning Cloak, Red Admiral, and Great Spangled Fritillary. The state is also home to several fritillary species beyond that one, along with the well-known Mourning Cloak.
Important Note: Species counts for Connecticut vary by source and survey year. The Yale Peabody Museum’s Connecticut Butterfly Atlas Project documented the occurrence of 117 species between 1995 and 1999, out of more than 120 species reported in the state at one time or another. Some newer identification sites round that figure down to 114 currently occurring species. The discrepancy comes down to historical sightings versus confirmed modern records rather than any single “correct” number.
The Monarch (Danaus plexippus) is probably the most recognized member of this family anywhere in North America, and Connecticut is no exception. This iconic orange and black butterfly is a well-established part of the local fauna, contributing to the roughly 114 species that currently inhabit the state’s ecosystems. Its “stained glass” pattern of orange separated by black veins makes it one of the easier species to identify at a glance, and it’s a favorite subject for anyone documenting the state’s most colorful animals.
The Viceroy is often confused with the Monarch at first glance, and understandably so. It is known for resembling the Monarch butterfly, with similar orange and black wings and white spots, but one distinguishing feature is a black line running through the Viceroy’s hind wings that the Monarch lacks. Viceroy butterflies are typically found in meadows and fields, feeding on nectar from flowers such as goldenrod and aster, and they lay their eggs on willow trees, which serve as food for the caterpillars.
The Mourning Cloak (Nymphalis antiopa) takes a completely different survival strategy. It’s one of the largest butterflies in Connecticut, with a wingspan of up to four inches, and it gets its name from dark, velvet-like wings often seen during the early spring months. Unlike many butterfly species that migrate south for the winter, the Mourning Cloak can hibernate through cold weather, and it’s typically found in deciduous forests and along the edges of wooded areas.
That long dormant period is a reminder that butterflies aren’t the only local wildlife built for extended winter rest; readers curious about other champion sleepers can browse this list of animals that sleep a lot for comparison. Mourning Cloaks are also known for unusually long lifespans compared to other butterfly species, with some individuals living up to a year.
The Painted Lady tells yet another story about how far a brush-footed butterfly can travel. This species is found in open, undisturbed areas like roadsides, pastures, and gardens, and it migrates south to Mexico over winter before returning north each spring. Its population can swing drastically from year to year, sometimes disappearing from a region for several seasons before suddenly showing up again in large numbers. It’s also the only butterfly known to mate year-round.
Two smaller species round out a solid field guide to the family. The Pearl Crescent is a small, orange-and-black butterfly found throughout Connecticut, common in fields, meadows, and gardens, and especially fond of nectar from asters and other late-season flowers.
The Baltimore Checkerspot (Euphydryas phaeton) offers a very different look. Its scientific name reflects its place among the more distinctively patterned butterflies recorded in the state. Some fritillary and checkerspot populations face habitat pressure as wetland meadows shrink, which ties into broader conversations about endangered animals in Connecticut and the habitat work being done to protect them.
The table below summarizes how these species compare at a glance, useful for anyone trying to sort out what just flew past the garden fence.
| Common Name | Typical Habitat | Notable Feature |
|---|---|---|
| Red Admiral | Forest edges, moist woodlands | Territorial males, fond of fermented fruit |
| Monarch | Meadows, milkweed patches | Orange “stained glass” wing pattern |
| Viceroy | Meadows near willow trees | Black line across hind wings distinguishes it from Monarch |
| Mourning Cloak | Deciduous forest edges | Hibernates as an adult; lives up to a year |
| Painted Lady | Roadsides, pastures, gardens | Long-distance migrant to Mexico |
| Pearl Crescent | Fields, meadows, gardens | Small, drawn to late-season asters |
| Baltimore Checkerspot | Wet meadows, bogs | Distinctive checkered pattern |
Behaviorally, this family shares a few habits beyond wing pattern. The Red Admiral itself occurs across the Northern Hemisphere, is multiple-brooded, and overwinters as an adult, occasionally shifting elevation when local conditions demand it. That flexibility is common across brush-footed species, which is part of why this family dominates butterfly counts in Connecticut compared to swallowtails, sulphurs, or skippers. For a full species-by-species checklist covering every family found in the state, the companion guide to butterflies in Connecticut breaks down 18 additional types beyond the ones covered here.
Anyone documenting sightings can also cross-reference finds against the Wikipedia list of butterflies of Connecticut, which organizes every recorded species alphabetically by scientific name, or consult the Yale Peabody Museum’s Connecticut Butterfly Atlas Project for historical distribution maps.
The Animal Diversity Web profile on Vanessa atalanta and the UC Davis Butterfly Site both offer deeper behavioral notes for readers who want to go further than a single field guide entry, and the identification tips at Bird Watching HQ’s Connecticut butterfly guide pair well with the wingspan and coloring details above.
Whether it’s a Red Admiral defending a sunlit patch of trail or a Painted Lady passing through on its way from Mexico, Connecticut’s brush-footed butterflies reward a little patience and a willingness to look closely at wing patterns that can seem similar from a distance but tell very different stories up close.