Human: I'm looking for some information about how to make a bird feeder. Assistant: 
You can make your own bird feeder by purchasing a plastic bottle and cutting it into pieces that are the size of your desired feeder opening. Then, you'll need to drill holes in the top of the bottle for drainage, fill the bottom with gravel or sand, and hang it from a tree branch or other elevated perch. Make sure to clean out the feeder regularly and keep it filled with fresh seeds or suet.