Hadena irregularis (Hufnagel, 1766)


Hadena irregularis: Adult (Valais, Switzerland) [M] Hadena irregularis: Adult (e.l. Switzerland, Valais 2012) [S] Hadena irregularis: Adult (Valais, Switzerland) [S] Hadena irregularis: Adult (e.l. Valais 2012) [S] Hadena irregularis: Adult (e.l. Valais 2012) [S] Hadena irregularis: Adult (e.l. Valais, Switzerland, 2012) [S] Hadena irregularis: Adult (e.l. Valais, Switzerland) [S] Hadena irregularis: Adult (Valais, Switzerland) [N] Hadena irregularis: Adult (e.l. Valle di Susa, Piedmont) [S] Hadena irregularis: L1-young larva [S] Hadena irregularis: Young larva (Valais, mid-June 2012) [S] Hadena irregularis: Young larva (Valais, mid-June 2012) [S] Hadena irregularis: L2-larva [S] Hadena irregularis: Half-grown larva (e.l. Valais 2012) [S] Hadena irregularis: Half-grown larva (e.l. Valais 2012) [S] Hadena irregularis: L3-larva [S] Hadena irregularis: Half-grown larva [S] Hadena irregularis: Larva in penultimate instar (e.l. Valais 2012) [S] Hadena irregularis: Larva in penultimate instar (e.l. Valais 2012) [S] Hadena irregularis: Larva in penultimate instar (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (Valais, Switzerland) [S] Hadena irregularis: Larva in last instar [S] Hadena irregularis: Larva in last instar [S] Hadena irregularis: Larva, lateral [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais, Switzerland) [S] Hadena irregularis: Larva (e.l. Valais, Switzerland) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (e.l. Valais 2012) [S] Hadena irregularis: Larva (prior to pupation) [S] Hadena irregularis: Head (e.l. Valais 2012) [S] Hadena irregularis: Head (e.l. Valais 2012) [S] Hadena irregularis: Pupa (e.l. Valais 2012) [S] Hadena irregularis: Pupa (e.l. Valais 2012) [S] Hadena irregularis: Pupa, the proboscis sheet is only little prominent in comparison with H. albimacula and H. bicruris and is similar to H. confusa. [S] Hadena irregularis: Pupa, beginning darkening with final imaginal development [S] Hadena irregularis: Habitat in the Valais in the spring [N] Hadena irregularis: Habitat: steppe slope with Silene otites in the Valle di Susa, Italy (Piedmont) [N]

Host plants:
Silene otites and Gypsophila fastigiata

Habitat:
Hadena irregularis colonizes hot steppe biotopes, rocky slopes and sandy grasslands. It also occurs on gypsum.

Life cycle:
The moths fly in May and June and again in an partial second generation from mid-July. The pupa overwinters. I collected larvae with Silene otites around the 20th May 2007 on a rocky slope in the Susa Valley, and in mid-June 2007 and 2012 in Valais, also with Silene otites. I found moths in both regions during the day resting on flowers of Silene otites.

Endangerment: threatened with extinction

Endangerment factors:
In Germany Hadena irregularis is threatened with extinction by habitat destruction. It still occurs only in a few, very warm areas, such as at the Kyffhäuser mountains. In the Southern Alps the steppe-like rocky slopes are also in decline due to viticulture, afforestation, succession after abandonment of extensive grazing and overbuilding (houses etc.).

Remarks:
The total distribution ranges from the Pyrenees to Siberia. Isolated populations occur in England and Sweden. Hadena irregularis is yet most common in dry valleys of south-central and the Southern Alps, but there also pushed back more and more, for example in the Valais.



Hadena adriana | Hadena albimacula | Hadena bicruris | Hadena caesia | Hadena capsincola | Hadena clara | Hadena compta | Hadena confusa | Hadena consparcatoides | Hadena drenowskii | Hadena filograna | Hadena gueneei | Hadena laudeti | Hadena luteocincta | Hadena magnolii | Hadena nevadae | Hadena perplexa | Hadena ruetimeyeri | Hadena sancta | Hadena silenes | Hadena silenides | Hadena syriaca | Hadena tephroleuca | Hadena vulcanica | Hadena wehrlii 
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