FEB 17th 2018: I cobbled together this map of the bagworm cases I found near to home in the last two years. All were on or near dry stone walls and at quite high altitude. They're often numerous when they do occur.
A REQUEST: If anyone does find any other bagworm species in or close to Calderdale in the next few months then I'd be grateful if they could forward me site details so I could hopefully rear some through and photograph the life cycle stages. I'm particularly interested in Psyche casta and Narycia duplicella.