Trauermantel.de is an educational website devoted to the mourning cloak butterfly, Nymphalis antiopa, a distinctive and often elusive species found across the Northern Hemisphere. It brings together information on the butterfly’s biology, distribution, conservation, research, and identification, alongside photographs, videos, literature, links, and accounts of sightings and cultural recognition.

The site describes the butterfly’s life cycle, appearance, behavior, and habitat. Visitors can learn that caterpillars feed mainly on willows and birches, while adults favor tree sap, overripe fruit, and other non-floral food sources. Topics also include migration, summer and winter dormancy, predators and parasitoids, and the effects of temperature on wing patterns. The resource explains the species’ seasonal changes in wing-edge color, its longevity, and its six recognized subspecies across its broad range. It also discusses climate-related challenges to overwintering and regional distribution. Organized sections, a search function, and a sitemap help readers explore the material, making Trauermantel.de a focused reference for people seeking reliable natural-history information about this butterfly.