Use Bags to Protect Grapes from Birds We purchased mesh tie bags from Amazon, which work fairly well deterring birds and protecting the fruit. You’d be surprised though – you must tie the bags securely around the vines. We found several untied. I swear, the birds are smarter and more creative than you’d think. We’ve also used brown paper bags with rubber bands. This does not work as well – they usually fall off or get wet from the sprinklers.