A pair of robins and their brood have made an unlikely home in the housing of a truck-mounted forklift at Coventry-based Moffett-Kooi.
Conservation laws prevent Moffett-Kooi moving the family, forcing the company to leave the machine idle on the forecourt.
Operations manager Nigel Brooks told the Coventry Evening Telegraph the machine had only just arrived from Holland.
The company has had to quarantine the machine and import another one from the Dutch factory.
Mr Brooks said: "Well, we're a big company and these things happen, so we just absorb the cost".