At a timber-mill in the Powelltown district (Victoria) it is customary to blow three blasts of the whistle to indicate an accident and six blasts to notify a fatality. One day the six blasts echoed about the hills and men ran from all directions to the mill. But there was no fatality; the ‘whistle’ was produced by a Lyrebird, which had heard the three blasts with some frequency, and, in imitating them, had added three more for good measure. That episode ranks with one related by Mervyn Bill, a forest surveyor, who has written that when he was camped at Hell’s Gates (Victoria), he was annoyed to see, through the theodolite telescope, his men doing certain field operations without the usual instructions. The fact became revealed, subsequently, that they had obeyed ‘instructions’ from a Lyrebird in an adjacent gully, which faultlessly imitated the surveyor’s shrill, staccato code of signals.
— Alec H. Chisholm, Bird Wonders of Australia, 1958
See Technical Fowl.