Porch light? The other day when I was in the electrical department of my local grocery superstore (NOT WallyWorld I might add), I saw light sensitive things you can screw into your current porch light that will turn it on in the evening / off in the morning, you just need to know if you're using an incandescent or florescent light bulb.

At least if the porch light is on, you'll see your birdie coming.