Tolga Temuge, executive director, said BirdLife condemned any act of vandalism and statements that were inciting hate and intolerance.
"Our campaign in Malta is about hunting in spring and the killing of protected species which are both illegal in the EU. We strongly condemn any attempt that is aimed at diverting focus from real issues of conservation,” he said.
BirdLife said its staff and volunteers have joined other international conservationists who are currently monitoring raptor migration in Messina, Sicily, once notorious for its illegal hunting.
"The mountains of Messina used to be renowned as an illegal hunting hotspot until conservation organisations ran a successful campaign that put an end to poaching in Sicily in the 1990s," the society said.