Orchard bird scare machines
For many years I suffered serious bird damage to crops in my small fruit orchard. Finally I started experimenting with bird scare devices and came up with very effective but low tech methods that achieve 90% or better effectiveness. These machines would work equally well for gardens or small vineyard or berry patches.
Videos of my bird scare machines can be seen here: http://sunnyslopeorchard.blogspot.com/2013/05/our-orchard-bird-scare-machines-dont.html (link is external)