Host plants:
The larvae are polyphagous, e.g. Rubus caesius, Urtica and many others. I found a caterpillar at night in April at 1.5 m height in a privet along with those of Polyphaenis sericata.
Habitat:
Polia nebulosa inhabits forests of all kinds, besides also structurally rich hedgerows etc. The moth is especially typical of at least slightly moist habitats.
Life cycle:
The caterpillar overwinters and can be found until early or mid-May. I found them with a pocket lamp at night in the spring on dewberry and privet and found an individual during the day under moss on a willow tree base. In the autumn (late September and October), I found it during the day in tufts of Molinia and other vegetation. The moth flies from late May to late July.
Endangerment factors:
Polia nebulosa is not endangered.
Remarks:
Polia nebulosa is widespread in temperate Europe and Asia.