He could say “goddag” (hello) and “gå væk” (go away), and he would use them in context. Say hello to people entering, and go away if he wanted to be left alone.
When he was young he would steal my granddads cigar, fly up somewhere high in a tree or a lightpole, but where he could be seen, and dismantle it.
He grew very old and had a lot of white feathers in the end. I’ve always liked jackdaws after that, I love seeing them around and their little personalities.
Edit: Apologies - dead link, after years of being up :/
See: https://flickerfest.com.au/film/ngarritj/
18 minute short film about a very social corella that adopted an entire community in the north of Australia, surfing on car bonnets, stealing cards from players, performing for food, hurling insults, teasing dogs, etc.
I managed to get a recording once: https://drive.google.com/file/d/109wzdIsVW7hZwX1-8M3IioUMr49...