“[The] Germans themselves made extensive use of decoys to protect airfields and other targets. One example in the Netherlands was constructed with particular care, made almost entirely of wood and including hangars, gun positions, aircraft and vehicles. However, it took so long to build that Allied photo interpreters had plenty of time to observe it. The day after it was finished, a solitary RAF plane flew over and circled the field once before dropping a large wooden bomb.”
— from the book Deception in War, by John Latimer, Overlook Press, 2003, ISBN 978-1585673810.
(Thanks to Kate Pearce for bringing this to our attention.)