I have to tell you this Ant,one contrived amateur doco does not make you an expert on this topic.The Graf brothers make no secret that they are avid hunters and that is their main interest in this.As for the emotive bollocks about the silent dawn chorous etc how about taking a visit to pureora forest?You can listen to kokako which are one of the best for this,along with numerous tuis,bellbirds etc etc.They were not even present there before the use of this indiscriminant killer,now there is a healthy breeding populations present,can you explain that?I can,eradication of predators,stoats and more so egg eating possoms.The most vehement opposers of this stuff often have their own interests at heart such as hunting,possom skins,one even has a patent for a possom plucking machine so even someone of your brainpower should be able to figure it out?All this emotive scarmongering is just that,and you have fallen for it.