Australia isnt for you.
Heres the tried and tested approach for the fly kill ,bend and load up the middle finger with the thumb,move real slow with that hand towards them and then Flick them just before they bend their legs to jump off.
Gets black flies down and spinning 7 out 10 if your good.
MArch flys and blowies 9 out 10
Then do as X states.
Funny shit X.hahaha