In speaking of Crows, I covered a few Schoolies out to East Cork on and off fer the last few years, going out through Castlemartyr at 7.30am and no problems, collect the special needs chungwan in Killeagh and head back home to Cork, coming back through Castlemartyr at 8am was a different story, Tens of Thousands of Crows lined every Gatepost, Wall, Rooftop, Telephone wire. Alfred Hitchcock's "The Birds" has nothing on this phenomenal sight, it is actually quite scary to drive through, I always close all windows and lock the doors !
Seemingly that is their meeting point each morning, maybe to discuss the previous days encounter's, find out who is Rydeing who, best place fer Grub, Etc.