Colocasia coryli (Linnaeus, 1758)


Colocasia coryli: Adult (e.l. Memmingen, ex August 2010) [S] Colocasia coryli: Adult (e.l. Memmingen, ex August 2010) [S] Colocasia coryli: Adult (e.l. Schwäbisch Gmünd, July 2011) [S] Colocasia coryli: Adult [S] Colocasia coryli: Adult [S] Colocasia coryli: Adult [S] Colocasia coryli: Egg on Tilia (Kronburg near Memmingen, June 2012) [M] Colocasia coryli: Young larva (e.o. Memmingen 2012) [S] Colocasia coryli: Young larva (e.o. Memmingen 2012) [S] Colocasia coryli: Young larva (e.o. Memmingen 2012) [M] Colocasia coryli: Half-grown larva (e.o. Memmingen 2012) [S] Colocasia coryli: Half-grown larva (e.o. Memmingen 2012) [S] Colocasia coryli: Half-grown larva (e.o. Memmingen 2012) [S] Colocasia coryli: Larva in penultimate instar (Memmingen, August 2010) [S] Colocasia coryli: Larva (dark form, eastern Swabian Alb 2012) [S] Colocasia coryli: Larva (e.o. Memmingen 2012) [S] Colocasia coryli: Larva (e.o. Memmingen 2012) [S] Colocasia coryli: Larva (Memmingen, August 2010) [S] Colocasia coryli: Larva in penultimate instar (Memmingen, August 2010) [S] Colocasia coryli: Larva after the last moult (Memmingen, August 2010) [S] Colocasia coryli: Larva [M] Colocasia coryli: Larva [S] Colocasia coryli: Larva (Memmingen, August 2010) [M] Colocasia coryli: Larva (Memmingen, August 2010) [M] Colocasia coryli: Larva (Memmingen, August 2010) [M] Colocasia coryli: Larva (Schwäbisch Gmünd, early July 2011) [M] Colocasia coryli: Larva (e.o. Memmingen 2012) [S] Colocasia coryli: Feeding pattern: the larva loosely spins together two leaves and feeds from one edge (Memmingen 2010) [N] Colocasia coryli: Pupa (e.l. Memmingen 2010) [S] Colocasia coryli: Habitat in a beech forest: larval records on lower branches [N]

Host plants:
The larvae are polyphagous on deciduous wood. I found often caterpillars on Fagus sylvatica. In 2012, I observed repeatedly eggs and young larvae on Tilia.

Habitat:
Colocasia coryli is found in forests of all kinds, where deciduous trees are at least interspersed. Besides it is observed also in tree-rich areas out of the forest.

Life cycle:
The pupa hibernates. In most areas, Colocasia coryli has two generations from late March or April to early June and from July to August. At higher altitudes, from about 600m above sea level, probably an elongated generation from late April to July dominates, which is expected to be superimposed of individuals of a partial second generation. The caterpillars are particularly found in the late summer, but should already feed in June or earlier (own observations of eggs and larvae in June 2012).

Remarks:
Colocasia coryli is found in most parts of Europe and temperate Asia to Lake Baikal. It is typical of the beech forest zone and therefore restricted in Southern Europe to higher altitudes.


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