Sugar gliders were introduced to Tasmania around 180 years ago. They have contributed to the endangerment of the native swift parrots. The Tasmanian government is planning a cull of sugar gliders to protect the parrots.
http://www.abc.net.au/news/2018-09-30/government-plan-to-cull-sugar-gliders-to-save-swift-parrots/10322548