Small Tortoiseshell (Aglais urticae)
Here’s a detailed overview of the Small Tortoiseshell (Aglais urticae) — one of Europe’s most familiar and beloved butterflies:
🦋 Small Tortoiseshell (Aglais urticae)
🔹 Taxonomy
- Family: Nymphalidae (Brush-footed butterflies)
- Genus: Aglais
- Species: Aglais urticae
- Authority: (Linnaeus, 1758)
🔹 Identification
- Wingspan: 45–62 mm
- Upper side:
- Bright orange forewings with black and yellow patches
- Three black spots and a bold black margin
- Blue crescent-shaped markings along wing edges
- Hindwings: More uniform orange with black and blue border
- Underside: Cryptic mottled brown and grey—provides camouflage when resting
🔹 Distribution
- Range: Widespread across Europe, temperate Asia, and parts of China and Japan
- Present from the British Isles and Scandinavia down to Turkey and as far east as Mongolia
🔹 Habitat
- Versatile and adaptive:
- Meadows, gardens, hedgerows, open woodland, parks, roadsides
- Found from sea level to alpine zones
🔹 Life Cycle
- Broods: Typically 2–3 generations per year (especially in southern Europe)
- Flight period: March to October (overwinters as adults)
🐛 Eggs
- Laid in clusters on the underside of stinging nettle (Urtica dioica) leaves
🐛 Larva (Caterpillar)
- Black with yellow stripes and spines
- Gregarious in early instars
- Feed exclusively on nettle
🐛 Pupa (Chrysalis)
- Mottled brown/gold
- Usually attached to nearby vegetation
🦋 Adult
- Feeds on nectar-rich flowers like buddleia, thistles, clover, dandelion
- Will enter hibernation in sheds, wood piles, tree hollows, or attics
🔹 Behavior
- Territorial: Males guard sunlit patches
- Basking: Often seen sunbathing to warm up
- Migratory/local dispersal: In early spring, adults emerge from hibernation and disperse to lay eggs
🔹 Conservation Status
- IUCN Red List: Least Concern
- Declines noted in some regions (especially UK) due to:
- Habitat loss
- Pesticide use
- Climate change
- Parasites like tachinid flies
🔹 Similar Species
- Peacock (Aglais io) – larger, with striking eyespots
- Comma (Polygonia c-album) – more ragged wings, paler orange
- Painted Lady (Vanessa cardui) – lacks blue border and has pinkish tones
🔹 Cultural Significance
- Seen as a symbol of summer and rural beauty
- Popular subject in art, photography, and butterfly conservation education
- Its early emergence makes it a sign of spring in Northern Europe
📸 Fun Fact
In sunny weather, Small Tortoiseshells can be seen engaging in aerial dogfights, spiraling rapidly upwards in what appears to be courtship or territorial defense.
Visited 97 times, 11 visit(s) today
Post Comment