31/12/20 It’s not so easy as you might think to identify a buzzard-sized raven in flight simply by size, unless there happens to be a crow mobbing it. And then you have to be certain that is a crow rather than a jackdaw or rook.
It has taken me a few years of experience and research to become confident in my identification of ravens. The first time I saw them must have been on a primary school trip to the Tower of London. As far as I know, I never saw or heard one again until I started walking the Southwest Coast Path. Making slow progress over the steep Cornish cliffs, I was alerted to the presence of an unfamiliar bird by a cronk: a deeper, gentler, altogether more beautiful and friendly sound than the caw of a crow.
Its voice is distinctive, but its pitch can vary, and this confused me at first. Sometimes the cronk is unmistakably low and sonorous; sometimes it is higher and sounds more like a gentle version of a crow. This is still the most reliable method of identification, however, along with its tail – if you manage to get a look – which is diamond-shaped (usually described as wedge-shaped), in contrast to the crow’s fanned tail. It has taken me many sightings and hearings, both at home and in the surrounding countryside, to be sure – absolutely sure – that the visitors to my garden the day after the winter solstice were a pair of ravens.