Thanks meshe1969 cool info!
G'day Alex, yeah I did think of Chytrid but there is nowhere to release it where i found it, in the middle of my lawn, no habitat whatsoever, my daughters dog is very likely to eat it.
maybe ill fill the kids old wading pool in the back garden, chuck in a few lillies maybe and leave it there?
few solar lights around it will attract moths for food. prolly the best i can do. *shrugs

Im thinkin the poor bugger will just hop away, dehydrate and die a cruel death, been very hot lately. It may do that wading pool or no. Oh well thats life eh!
Still love to know where it came from, my backyard is as dry as a mormon pub!