Monday, 26 November 2012

Pterophorus galactodactyla …

Rewell Hill Wood, 2 May 2012

The delicate Spotted White Plume, Pterophorus galactodactyla, is a nationally scarce species. The adult moth, which has a wingspan of around 20-25mm, has a pale forewing with a diagnostic backward-pointing rear lobe. The species is most likely to be recorded in the larval stage, when feeding signs, on the leaves of Lesser and Greater Burdock, are relatively easy to find where they are present. The characteristic evidence of feeding appears as white-rimmed, rounded holes in the leaves, starting at 2mm diameter in April up to around 8mm by the time they mature in May. The larva can often be found nearby, resting along the edge of a vein on the underside of the leaf. The larva pictured was around 7mm long. A shed skin can be seen in the bottom left of the picture. The adult moth flies in June and July ...

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