Vandals have cost the RSPB thousands of pounds in a series of attacks on the charity’s Belfast headquarters.
The attackers used fence posts to smash windows and window frames in the latest in a spate of vicious attacks on the premises in Belvoir Forest.
CCTV footage also revealed that the culprits filmed their vandalism using mobile phones.
The charity says that like many other conservation groups, it is waiting to discover the scale of the grant cuts it faces and can ill afford to lose thousands of pounds on repairing vandalism damage.
Since February this year the headquarters has been targeted nine times, all carried out in the evenings or weekends when the office is unmanned. Director Dr James Robinson described the attacks as “extremely disturbing”.
“Over the weekend we have returned to find the windows put in and glass all over the offices. These senseless acts of violence cost us both time and a lot of money — time and money which could be going to do more for Northern Ireland’s wildlife,” he said.
Dr Robinson said that the charity had been forced to install CCTV a few weeks ago.
“We are working with police to find the culprits. In the meantime, if anyone has any information, we would urge you to go to the police,” he added.