Ah, I comisserate! My father has had one land upon his doorstep some 4 months ago, and it's taken up residence. We are now calling my father Wylie Cyote due to all of the atnics he gets up to in order to catch this bird and re-locate (which by the way is illegal - but who's telling?) Its one of the smartest birds you will ever come across - and very destructive. It digs up all if his veg, his trees down to their roots, his lawn, you name it. He hates it with a passion. The law protects them however, and the best advice I can give you is to learn to live with it (which is easy coming from someone who doesn't have to right? :-))
Paula Granelli
PDC
PermUP
Permaculture design from Balcony to Broadacre