A white-tailed eagle was among the birds poisoned in past three years, report found.
More than 30 protected birds of prey were killed in Northern Ireland in three years, according to a report on wildlife crime.
A golden eagle, white-tailed eagle and peregrine falcons were among the rare species poisoned between 2009 and 2013 although the most common casualties were buzzards and the recently-introduced red kite.
Environment Minister Mark H Durkan condemned those behind the illegal attacks as reckless.
He said: "It is a great shame people here are poisoning these wonderful, majestic creatures which brighten up our skies and countryside.
"I very much condemn the reckless and illegal actions of the minority in our midst who destroy beauty with painful death, leading to the loss of such iconic species. I urge the public to be vigilant and report offenders."