Mourning Cloak
Nymphalis antiopa
The Mourning Cloak is a large butterfly in the family Nymphalidae, native to Eurasia and North America. It is easily recognized by its distinctive dark maroon to purplish-black wings featuring a bright yellow border and a row of iridescent blue spots. This species prefers open woodlands, forest edges, and sunny clearings near water bodies. It is one of the few European butterflies that overwinters as an adult insect (imago).
Details
Identification
Dark brown wings with yellow margins and blue spots, wingspan 61-75 mm, underside marbled grey-black.
Social behavior
Solitary; males defend territories along forest edges against competitors.
Diet
Adults feed on tree sap and rotting fruit; caterpillars feed on leaves of willows, birches, and elms.
Spawning substrate
Twigs of willows (Salix), birches (Betula), or elms (Ulmus).
Overwintering
Overwinters as an imago in tree hollows, woodpiles, or rock crevices.
Ecology
Ecological role
Pollinator and important part of the food chain for birds and predatory insects.
Natural predators
Birds, spiders, predatory insects, bats.
Competitor species
Other nymphalid butterflies with similar habitat requirements.
Ecosystem service
Occasional pollination and contribution to biodiversity in forest ecosystems.
Threats
Habitat loss due to intensive forestry, pesticide use, and climate change.
Scientific profile
Profile
Distinguishing features
Unique coloration in Europe; the light margin combined with the dark ground color is unmistakable. The wing edges are irregularly scalloped. The underside of the wings is marbled dark grey to black, providing excellent camouflage on tree trunks (bark mimicry).
Habitat
Open deciduous and mixed forests, forest edges, clearings, sunny riparian woodlands, and moors with birch or willow growth. Prefers cool-temperate climates.
Protection & threats
Main threats
Intensification of forestry, loss of open forest structures, removal of softwoods (willows, birches), use of insecticides, and climate change (mild winters lead to premature awakening and energy loss).
Population trend
On the watch list (V) in Germany; regionally declining significantly, especially in lower altitudes. Classified as threatened (3) in some federal states.
Conservation measures
Promotion of near-natural forestry with the preservation of softwoods, protection of riparian woodlands, retention of old and dead wood, and creation of open forest structures.