Bells on the collar are not enough. Reduce feral cat populations. Eliminate sources of food, such as garbage or outdoor pet food dishes, that attract raccoons, opossums, jays, stray cats, etc. Learn the birds on your land Get to know the birds in and around your orchard. Create a species list of all the birds encountered and note at what time of the year they occur there, which are breeding, etc.
Birds nest at a wide variety of heights, from ground level to the tops of trees.
Mowing, spraying, and other planned disturbance events should be timed to minimize impacts during this crucial breeding period. Postpone mowing until after breeding season. Six inches is also enough to discourage cowbirds.