There was an old gentleman with whom I used to go on an occasional ramble through nearby hills here in Edinburgh. He introduced me to a small family of four crows who knew him really well and who'd gently follow us for a good part of the way. In fact, I'd never have noticed this were it not for his devoted relationship to these particular birds, and they to him.
He passed away a couple of years ago, sadly. What's certain is that he would have long known the things that 'scientists' belatedly come to realise, and whose understanding has to constantly shift towards giving these and other animals an almost begrudging newfound respect, whilst establishing dubious new standards for human 'uniqueness'. Many thanks to Luke for the link.