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Female and the smaller male.

Drinker Moth Andy
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Female Drinker Moth, drying wings.

Drinker Moth (Philudoria Potatoria)

I often find the large caterpillars of this moth in the spring, after the larvae have spent the winter in hibernation feeding on reads alongside the River Itchen in Hampshire, UK. The Drinker moth gets its name from the larvae drinking droplets of rainwater. When alarmed the large caterpillars curl up into a ball, protected by their hairs which are quite irritable. The caterpillar also mixes its hairs into their cocoons to protect the pupae inside. I know from experience rearing and handling the cocoons of this species for photography many years ago, left me with a rash on my hands. Moths are on the wing from July to August.
The caterpillars feed on grasses and reeds and grow to quite a large size compared to the resulting moths. I have found full grown caterpillars sunning themselves in on tree branches, barbwire, bramble bushes and tree barks. The moth is also interesting to photograph with the shrew-like appearance of its head.

 

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Larvae resting on tree, Farley Mount, Hampshire UK.

FujiFilm S1 Pro. 1/30 F56, Sigma 105mm Macro lens.09/05/11.

Drinker Moth Larvae resting on barbed wire, Falington Marshes, Portsmouth, UK.