Bush users go to court to halt mass brumby cull

The NSW government is being sued in a bid to stop mass culling of brumbies. (HANDOUT/BRUMBY WEEK)

A pro-brumby community group has taken the NSW government to court in a bid to bring an urgent halt to mass culling of wild horses in a major national park.

The decision to use aerial shooting to control brumbies in Kosciuszko National Park was "infected by error of law", the Snowy Mountains Bush Users Group claims in its NSW Supreme Court action.