Interestingly Richard, I wholeheartedly agree with your comment regarding Corvid vocal response to raptors. For me it’s either a frantic “caw-caw” or a soft “crick” which I think is more often than not, used when Accips.are about. However on Saturday in Eastern England
, I was scanning over rolling farmland adjacent to the end of a hedgerow and telegraph pole, watching several Buzzards on high, and was attracting one closer, with my (much practised) “pew” calls, when I heard just normal Corvid calls, certainly nothing exceptional with the “pitch” or frequency, I almost didn’t bother looking up. I’d have regretted it for evermore had I not!.....looking up perhaps 4m above the telegraph pole, coming towards out of a perfect blue sky, an immature Gos! framed by 4 Corvids, needless to say the resulting images were quite simply...to use an “Americanism” simply awesome, will publish later. The moral to this is “ya never can tell”. :t: