Crow scarers, those bangers on a slow fuse ...
It's probably a regional thing ... but over here in deep dark East Sussex they are called Rookies. Said explosive equipment is used liberally around these parts during the Bonfire Season (Lewes Guy Fawkes etc.) ... which is just about to kick off.
Known to be used for other purposes
Anyway ... What happened to the Air Traffic Landrover with his box of cassette tapes, PA system, binoculars and a copy of the Observer Book of Birds ?
Coff.