Vanessa virginiensis
Widespread orange-brown butterfly with distinctive large eyespots on the underside of the hindwings and a small white spot in the orange forewing field. Caterpillars feed on pussytoes, cudweeds, and everlastings — members of the Asteraceae tribe Gnaphalieae — in solitary silk-tied leaf nests. A migratory species that recolonizes southern Canada each year.
Seasonal Activity
Diet
Foliage of pussytoes (Antennaria), cudweeds (Gnaphalium), and everlastings (Anaphalis) in the Asteraceae tribe Gnaphalieae (larva); flower nectar from dogbane, aster, goldenrod, common milkweed, and purple coneflower (adult)
Lifecycle
Three to four broods from May through November. Adults hibernate, but may not survive very cold winters in southern Canada — northern populations are likely recolonized each spring by migrants from the southern United States. Males perch on hilltops or low vegetation in the afternoon to await females. Females lay eggs singly on the upper surface of host plant leaves. Caterpillars are solitary, constructing individual nests by tying leaves together with silk and feeding within this protected shelter. Pupation occurs within the leaf nest or nearby. The winter form is smaller and paler; the summer form is larger with brighter orange and brown colouration. All stages of the life cycle can be found throughout temperate North America, and the species occasionally strays as far as Newfoundland, Labrador, and even southwestern Europe.
Ecology
Host Plants
Pollinates
Details
Description
The American Painted Lady (Vanessa virginiensis) is a medium-sized, orange-brown butterfly in the brush-footed family (Nymphalidae) with a wingspan of 4.5-6.7 cm. The upperside is a warm, uneven pattern of orange, brown, and yellow, with a distinctive black apical patch on the forewing containing a small white spot in the orange field below it — a key identification feature that distinguishes it from the closely related Painted Lady (V. cardui). The underside of the hindwing bears two large, prominent eyespots, another reliable field mark that separates it from the similar species.
The species is one of four Vanessa butterflies in North America — a genus that includes some of the most familiar and widely distributed butterflies on the continent. It ranges from southern Canada to Colombia, with resident populations in the southern United States, Mexico, and Central America, and migratory populations that recolonize the northern United States and southern Canada each spring and summer. Adults hibernate, but it is uncertain whether they can survive the coldest Ontario winters — northern populations may depend on annual recolonization by migrants from the south. The species has also been introduced to Hawaii and occasionally strays to Europe.
Known as the American Lady, American Painted Lady, or historically as Hunter's Butterfly — named not for a hunter but for the 18th-century anatomist William Hunter, a friend of the entomologist who first described the species — it is a butterfly of open, sunny habitats including dunes, meadows, prairies, vacant lots, and forest edges.
Lifecycle
Three to four broods are produced from May through November across most of the range, with the species active year-round in the Deep South and Texas. Males perch on hilltops or low vegetation during the afternoon to await passing females. Females lay eggs singly on the upper surface of host plant leaves. The caterpillars are solitary — each larva constructs its own individual shelter by tying together leaves with silk and feeds within this protective nest. This solitary, leaf-tying behaviour is characteristic of the genus and distinguishes it from the gregarious larvae of many other nymphalid butterflies.
Pupation occurs within or near the leaf nest. Adults hibernate through the winter, though the species' ability to survive prolonged freezing temperatures is uncertain. In southern Ontario and other northern portions of the range, populations may be replenished each spring by migrants moving northward from the southern United States — a pattern similar to that of the familiar Monarch, though less celebrated and less well studied.
Ecology
The American Painted Lady is a specialist herbivore in its larval stage, restricted to a single tribe of plants: the Gnaphalieae within the Asteraceae. Caterpillars feed on pussytoes (Antennaria), cudweeds (Gnaphalium), pearly everlasting (Anaphalis), and occasionally wormwood (Artemisia) and ironweed (Vernonia). In Ontario, Field Pussytoes (Antennaria neglecta) is the primary documented host — a relationship that makes the conservation of dry, open, prairie and savanna habitats doubly important, as they support both the host plant and the butterfly that depends on it.
Adults nectar on a wide variety of flowers, with a preference for composites and milkweeds: common milkweed (Asclepias syriaca), goldenrods (Solidago), asters (Symphyotrichum), dogbane, and selfheal. The butterfly is frequently observed in gardens, meadows, and along roadsides throughout the summer, its warm orange colouration and distinctive flight pattern — a series of rapid wingbeats followed by a short glide — making it one of the more recognizable butterflies in the Ontario landscape.
The species is demonstrably secure across its vast range (G5 globally) and is not of conservation concern. However, like all migratory Lepidoptera, it is vulnerable to the cumulative effects of habitat loss across its migratory pathways — the same threats facing the better-known Monarch, though the American Painted Lady has received far less attention.
Host Plants
Larvae feed exclusively on members of the Asteraceae tribe Gnaphalieae, a group of plants characterized by their woolly, silvery foliage and dry, papery flowerheads. The caterpillars are solitary, each living in its own silk-tied leaf nest.
- Field Pussytoes (Antennaria neglecta) — primary Ontario host
- Other pussytoes (Antennaria spp.)
- Cudweeds (Gnaphalium spp.)
- Pearly Everlasting (Anaphalis margaritacea)
- Plantain-leaved Pussytoes (Antennaria plantaginifolia)
Habitat
Occupies a wide range of open, sunny habitats with low vegetation: dry prairies, oak savannas, sand dunes, meadows, vacant lots, roadsides, and forest edges. The species is primarily associated with the same dry, open, nutrient-poor sites that support its Antennaria host plants — a tight ecological coupling that makes it an indicator of healthy prairie and savanna ecosystems. In Ontario, it is found throughout the southern portion of the province during the summer months, with abundance varying from year to year depending on the strength of northward migration. The species is globally secure (G5) and not listed under any conservation legislation.