This time of year the English Sparrows really seem like a swarm of locusts. They come and go in swarms. I was thinking it might be selective, humane, and efficient to provide a few special perches for them. Unlike trapping which can inadvertently stress other birds, or pellet guns which are often forbidden by local ordinances, inconvenient, inaccurate, and frighten other birds, this perch idea seems like it might be worth trying. The male English Sparrow likes to sit on top of birdhouses in any season as if staking a claim to them, or a hanging feeder could have a perch below the access hole. A careful identification of each bird would be possible before application of power as there are several similar native sparrow species.
My initial thought is to use either an old television power transformer or a small neon lamp transformer with a relay activating the transformer primary via a remote (12V) push-button. The transformer and relay would sit in the basement. The momentary contact push-button would plug into a wall jack next to the window upstairs. The transformer secondary wires would feed out through a PVC piped hole to the backyard. I do not know how conductive the feet of sparrows are and I do not know what their reaction time is relative to 16.7mS. I wonder if rather than momentary 60Hz I should instead discharge a cap into the primary of the transformer? Any thoughts?
Thanks,
Dave