My great-uncle who was a fabulously knowledgeable birder once told me that to really know birds well, you must learn their songs and calls. He added that in the garden though the great tit has an easy “see-saw” call to recognise, it also causes confusion for its range of calls throughout the year is astonishing. So when I don’t instantly recognise something, I often wait and watch and find that it is indeed a great tit. Great tits love garden feeders and also dominate the property market by commandeering nest boxes. Black-headed Bob and saw sharpener are two of their old nicknames.