In reply to gammarus:
Yes, they do seem confident to interact with people.
I was scrambling up Foxes Rake on Sgùrr a' Mhadaidh in the Cuillins and had a prolonged exchange or conversation with a Raven. We cawed to eachother while I ascended, it regularly relocating to keep the same distance and maintain the exchange, with me improving my mimic as it went on. As I emerged onto the top, it seemed content to leave and flew off down into Corruisk. I was glad no-one else saw this - they'd've thought me bonkers.