Mouse-ear hawkweed (Hieracium pilosella) is an invasive perennial herb in the daisy (Asteraceae) family. It is native to Europe and Asia but now occurs as a serious weed in New Zealand, Canada and USA.
A small infestation of mouse-ear hawkweed was discovered in December 2014, near Charlottes Pass in the Main Range of Kosciuszko National Park. The National Parks and Wildlife Service (NPWS) has an active control-and-detection program under way to eradicate this threat.
The National Parks and Wildlife Service in NSW is organising a volunteer program in the Snowy Mountains from January until March 2019. Volunteers help with identifying the location of hawkweed infestations.