class="YtLlr aHS+3 V-v0y fm7dv _8teMo _5pKBM" data-component="Text">It comes as the full extent of a feral population boom in the park is laid bare. Australian government estimates have revealed that over the past four years, feral pig numbers have doubled to around 70,000, wild buffalo numbers have jumped by 50 per cent to 7,500, and feral horses are now at around 15,000 within the world-heritage-listed park. This service may include material from Agence France-Presse (AFP), APTN, Reuters, AAP, CNN and the BBC World Service which is copyright and cannot be reproduced