This Spring Usher in Bankhouse wood ignored all the dry stone walls and lichen covered trees to roost on a painted iron bridge.
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.
If anyone does find any other bagworm species I'd be grateful if they could forward me site details.