Correct Mike about the culling by choppers, this has been off and on since the 60's and not just camels, donkeys and goats were on the list too, on the WA side 2 choppers were based in Norseman, fuel was carted out as far as Madura and beyond, its a never ending problem with these feral animals in remote areas, in the early 70's my mate who was a door gunner was an expert and highly skilled shooter 99% were one shot kills, don't know what the cost today would be depends on the aircraft used and camel numbers in the area, sometimes a fixed wing would locate the herd first then send the chopper/s in, sad but that's the only way of controlling these ferals and the only drawback leaving the carcasses other ferals like foxes and wild dogs feed off them causing another problem.