Small Tortoiseshell Identification Guide
A common orange-red garden butterfly with black-and-yellow forewing markings and a border of blue crescents.
Read the full Small Tortoiseshell encyclopedia entry →
Key Visual Features
The Small Tortoiseshell (Aglais urticae) is a familiar, medium-sized butterfly with a wingspan of roughly 1.8 to 2.2 inches.
- Upperside is bright orange-red, patterned with a series of black spots and yellow patches along the front edge of the forewing
- The outer margin of both wings carries a row of small blue crescent-shaped spots set against a dark border, a distinctive accent color for this species
- Underside is dark brown to blackish, mottled and camouflaged, providing cover when the wings are closed at rest
- Wing margins are gently scalloped rather than smooth
- Body is dark and relatively small, matching the wing base color
Where and When to Look
This species is one of the most familiar butterflies across Europe and temperate Asia, found readily in gardens, parks, meadows, hedgerows, and waste ground, essentially anywhere flowers and its host plants are available. Adults overwinter in sheltered spots such as sheds, garages, or hollow trees and are often among the first butterflies seen on warm late-winter or early-spring days. A fresh generation emerges in summer, and adults are commonly seen nectaring at garden flowers like buddleia and asters through late summer and into autumn.
Similar-Looking Species
- Large Tortoiseshell: larger overall, with a duller, less contrasty orange tone and fewer, more subdued markings, plus reduced blue in the marginal spotting compared to the Small Tortoiseshell
- Peacock Butterfly: shares the reddish base color but shows four large single eyespots instead of the Small Tortoiseshell's pattern of black-and-yellow forewing blocks and blue marginal crescents
- Comma Butterfly: has ragged, deeply notched wing edges and an overall more mottled orange-brown tone, quite different from the smoother-edged, brighter Small Tortoiseshell
Quick ID Checklist
- Bright orange-red wings with black-and-yellow forewing pattern
- Row of small blue crescents along the outer wing margin
- Dark, mottled, camouflaged underside
- Gently scalloped wing edges
- Common in gardens and open habitats across Europe/temperate Asia, seen from early spring through autumn
Frequently asked questions
How is the Small Tortoiseshell different from the Large Tortoiseshell?
The Small Tortoiseshell is more brightly colored with a distinct row of blue crescent marginal spots, while the Large Tortoiseshell is bigger, duller in tone, and shows less blue in its wing borders.
Why do I sometimes see this butterfly on warm days in late winter?
Small Tortoiseshells overwinter as adults in sheltered places and can emerge to fly on unusually warm days before the main spring flight begins.
What habitat is best for finding a Small Tortoiseshell?
It is a common garden butterfly, also found in parks, meadows, hedgerows, and waste ground across Europe and temperate Asia.
What color are the marginal spots that help identify this species?
Look for a row of small blue crescent-shaped spots along the outer edge of the wings, set against the dark wing border.
Small Tortoiseshell identified by the community
Recent Small Tortoiseshell finds identified with Bug Identifier.
