(UK here) Several native UK birds - e.g. Blue Tits - have blue elements but I don't think we have any wholly blue birds, so yes, an entirely blue bird to me imm

(UK here) Several native UK birds - e.g. Blue Tits - have blue elements but I don't think we have any wholly blue birds, so yes, an entirely blue bird to me immediately seems exotic, and definitely not a robin. Because we have juvenile Robins in our garden I am quite used to seeing Robins that don't have the classic red breast (they acquire this permanently in their first main moult) and I can now recognise Robins from their behaviours as well as their colouration. I agree with you that Robin Hood would have 'woodsiness' colours but until I read your comment I wouldn't have thought of comparing Robin (the bird) with Robin Hood (medieval outlaw).