What sort of flowers is he eating ?

I have to put a wire guard around any trees, that I plant in my bushy area, else they get nibbled by the wallabies.

The guard is about 1.8 m high, with two wooden stakes.

Not allowed to kill the wallaby, you have to live in harmony with it !

Good luck. Perhaps you need to fence your garden area.

or do what one of the pommie gardeners has done on TV to keep foxes away from his chooks - put human hair clippings in some pantyhose and tie them to a fence - if it is spooked by you, it may be spooked by your smell??