the pressurised water detector worked on a US mate's herons........
his neighbour was in deep poo-poo land when he took his airgun to them up to a $5000 fine....... someone reported him and the police turned up with a game warden. He was vehmently denying it and then, suddenly, out of one of his trees, this heron falls out, dead, right between them all. My neighbour who was witnessing this was rolling around on the floor, wetting himself with laughter..... (He got away with a caution and a $150 fine).