Kites, canons, predatory birds and Mylar tape all have one thing in common: they are used by growers in an often futile attempt to scare away birds. However, the birds only get used to them in time. Experts agree the only sure and humane method is exclusion. This is where bird netting comes in. "As far as I'm concerned bird netting is the only thing that works," said Glen McGourty, University of California winegrowing advisor in Mendocino and Lake counties. "These bird-scaring devices jus...