Jack jumper ants send more people to hospital in Tasmania than in rest of Australia By Adam Langenberg TueTuesday 2 updated WedWednesday 3 Marley, now 9, is not scared of playing in the grass anymore. ( Print text only Cancel Four-year-old Marley Dowde was playing cricket in her northern Tasmanian backyard in January 2016 when she was stung twice in quick succession by a jack jumper ant. Key points: Tasmanians were hospitalised at the highest rate for ant, tick and caterpillar stings in 2017-18 Experts blame this on the prevalence of jack jumper ants, a highly aggressive species, in Tasmania The Jack Jumper Allergy Program helps desensitise people to jack jumper venom