Thalera fimbrialis (Scopoli, 1763)

Thalera fimbrialis: Adult (e.l. Haute-Provence 2009) [S] Thalera fimbrialis: Adult few seconds after emergence [S] Thalera fimbrialis: Adult expanding its wings [S] Thalera fimbrialis: Adult (e.l. Valle di Susa, Italy) [S] Thalera fimbrialis: Larva (Susa) [M] Thalera fimbrialis: Larva (Haute-Provence, La Palud sur Verdon, June 2009) [M] Thalera fimbrialis: Larva [M] Thalera fimbrialis: Larval head [M] Thalera fimbrialis: Head lateral [M] Thalera fimbrialis: Larva caudal [M] Thalera fimbrialis: Pupa [S] Thalera fimbrialis: Pupa dorsal [S] Thalera fimbrialis: Typical larval habitat on dry slopes in Valais (April 2008) [N]

Host plants:
The caterpillar is polyphagous and is feeding mostly on various herbs. In rocky, steppe-like slopes it is often found at Artemisia campestris (e.g. Susa Valley in Piedmont).

Thalera fimbrialis inhabits nutrient-poor grasslands, heaths and rocky slopes.

Life cycle:
The caterpillar overwinters and is mature in May or June. The moths will fly from mid-June to August in a single generation.

Endangerment: endangered

Endangerment factors:
Thalera fimbrialis is in decline since grasslands are still trivialized by eutrophication, tourism and bush encroachment. Only in areas where there is still a comparatively dense network of grasslands, Thalera fimbrialis is still unchallenged, such as in the Southwestern Alps from about the Valais on.

Thalera fimbrialis is distributed across most of Europe and temperate Asia to about Korea.