Spotted this vapourer moth caterpillar, Orgygia antiqua, on a sanguisorba flower in my garden in Halifax this evening.
Over the years I’ve found them in the garden in the egg, caterpillar and adult stages. The adult female is flightless (see my post from the 12th of August last year
The male’s erratic flight put some naturalist long ago in mind of someone who had ‘taken the vapours’ – i.e strong drink – hence the name.