I looked it up out of curiosity, and while grey jays are said to be a bit cheeky, exceptional intelligence does not appear to be one of their particularly noteworthy features (and certainly they are nowhere NEAR the African Grey). And to complicate things, they’re not even called grey jays anymore; they’ve been officially renamed the Canada jay. Think of them as the North Macedonia of the avian world.
For the last question, that is what I would call a 'grey area' i.e. when something is not certain one way or the other, it is a bit of a grey area... I think this is a British saying, although (pre-empting nit-pickers) I don't presume to speak for ALL British people or ALL English-speakers. I would therefore suggest 'area' or 'areas' might be an acceptable alternative?
Small detail, but in biology, specific names (second part of the scientific name) always start with lowercase letters. So it should be Canis lupus. Ideally, the whole name should be italicized.
Why would "gray areas" not be accepted? That's how I've heard it referred to 99% of the time. I don't think I've ever heard someone say "shades of gray" in this context.
Types in grey areas and was annoyed.