Thames Valley Police wildlife officers have launched an investigation after two red kites were found dead near Wallingford.
Police were called last night and are currently investigating to see if the birds have been poisoned. If so, a criminal investigation will be launched under section one of the Wildlife and Countryside Act.
If tests due to be carried out on the birds to determine how they died show they were poisoned, the Thames Valley Police wildlife officer will launch an investigation to try and find those responsible.
Visit the RSPB website for more information about bird crime.