I am sure Local laws vary to a degree, but most songbirds are protected as are birds of prey. The Migratory Bird Treaty Act (MBTA) provides federal legal protection for wild birds with the exception of species not native to North America and resident game birds. Common Pigeon, European Starling, English House Sparrow (which is actually a finch) are normally ok to kill, but many of the birds that would be harassing you figs Mockingbirds, Thrashers, Catbirds, etc... I believe are protected most everywhere. You may be able to get a permit in some situations in regards to crop damage, but doubtful for a backyard grower. Your Geese would fall under Fish and Game laws as would other birds with a defined hunting season. I love most birds, but not trying to define right and wrong, just giving input to the question of why killing birds is more objectionable than killing a squirrel or rat. While squirrels have a defined hunting season for me locally they are also classified as nuisance animal.