SINGAPORE - A veteran wildlife expert has said he will pull out of environmental impact discussions with the developer of the Mandai nature precinct if he is made to sign a non-disclosure agreement barring him from speaking publicly.

Mr Subaraj Rajathurai told The Straits Times this following a spate of roadkill incidents involving at least five native mammals within the vicinity of the work site, which borders the ecologically rich Central Catchment Nature Reserve.