Cosmia affinis (Linnaeus, 1767)


Cosmia affinis: Adult [S] Cosmia affinis: Adult [S] Cosmia affinis: Adult [S] Cosmia affinis: Adult [S] Cosmia affinis: Young larva (Upper Rhine Valley, April 2009) [M] Cosmia affinis: Half-grown larva Cosmia affinis: Larva [S] Cosmia affinis: Larva [S] Cosmia affinis: Larva [S] Cosmia affinis: Pupa [S] Cosmia affinis: Young larval shelter [N] Cosmia affinis: Habitat (many young larvae) in late April 2009 (Upper Rhine) [N]

Host plants:
Usually, the caterpillars live on elm (Ulmus), but according to literature rarely also on other hardwoods.

Habitat:
Cosmia affinis inhabits elm-rich forests (hardwood floodplains) and other elm stocks. I found larvae together with those of Satyrium w-album on the eastern Swabian Alb at an elm-rich, semi-shady spot on a dry limestone slope. I also observed many young caterpillars on Ulmus minor in webbed leaf tips in fully shaded areas in the Upper Rhine Valley in April 2009.

Life cycle:
The eggs overwinter and the caterpillars are found from mid-April to mid-June. The flight time is from late June to September.

Endangerment: endangered

Endangerment factors:
Cosmia affinis is threatened by the decline of elm (destruction of riparian forests, elm disease, monocultures).

Remarks:
The distribution extends from Morocco across Southern and Central Europe and large parts of temperate Asia to Japan.



Cosmia confinis | Cosmia pyralina | Cosmia trapezina 
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