Hummingbird feeders are specially designed containers that hold a sugar-water solution to attract hummingbirds. These feeders typically have bright colors, especially red, to catch the attention of the birds. They come in various shapes and sizes, often featuring multiple feeding ports to accommodate several birds at once. To use a hummingbird feeder, fill it with a mixture of four parts water to one part sugar, and avoid using food coloring. It's important to clean the feeder regularly to prevent mold and bacteria, ensuring a safe feeding environment for the hummingbirds.