A hummingbird nest is not much bigger than a quarter, and often it contains just 2 to 3 eggs no bigger than small peas. It’s typically hard to see, as it blends in well to the tree branch it’s attached to, and is made of fine animal or plant down and moss or lichens. Humingbirds have been proven to really take to a product called “Hummer Helper” Nesting Material which provides a natural replacement for some hard to find materials.