Derbyshire Rural Crime team is investigating after two birds of prey were found dead in the Ault Hucknall area of Chesterfield.
A Kestrel and a Buzzard were found on Monday 23 March. Initial investigations lead officers to believe they have been poisoned rather than shot.
The birds have been recovered and an investigation launched.
Anyone with information is asked to contact the Rural Crime Team by emailing DRCT@derbyshire.police.uk quoting reference 20000159754.
You can also pass information anonymously to Crimestoppers by calling 0800 555 111 or visiting https://crimestoppers-uk.org/