Singing squirrel battery operated

I am searching for a plastic molded squirrel which is about 8 to 10 inches high. It works by some sort of motions sensor . When someone walks past it, the melody of "Whistle while you work" plays. It is something you would have outside and is is battery operated. The person I originally got it from referred to it as an "alarm" because you knew when someone was coming every time someone walked by from the music that played.