Lincolnshire Police are appealing for information after 200 game birds were stolen from a maize field south of Lincoln.
The theft took place on The Heath in Wellingore some time between 10pm on September 8 to just before midday on September 9.
Police believe that the offenders removed a lock to a pen in the maize field before leaving in an unknown direction.
Anyone who saw suspicious behaviour in the area at the time, or who has CCTV which may assist Lincolnshire Police in their investigation, should contact the force on 101, quoting incident number 105 of September 9.
Alternatively, contact the independent charity Crimestoppers anonymously on 0800 555 111.