Police are appealing for information after three red kites were found dead in Kirkcudbright in early May.
A post mortem examination confirmed that two of the birds had been illegally poisoned and results of the third are yet to be confirmed.
Red kites were saved from national extinction by one of the longest-running protection programmes. They've been successfully re-introduced in England and Scotland.
The birds are listed under Schedule 1 of the Wildlife and Countryside Act, stating it is an offence to intentionally or recklessly disturb at, on or near an ‘active’ nest.
Anyone with information is asked to contact Police Scotland or Crimestoppers.