Why would only humans make use of eco-friendly technology? We designed a birdhouse with a solar panel on its roof. During the day, sunlight feeds the solar panel, charging a small battery. At twilight the transparent stick will light up and cast a tiny light on your garden. This light attracts an easy nighttime snack for the bird — all she has to do is stick her beak out of the hole and wait for the buzz. 7.1" x 3.5" x 3.5". Meranti wood.