She builds the nest of soft plant material and other downy fibers, such as cottonwood fluff. It is usually held together with strong lightweight spider web, or horse hair. The nest is camouflaged with bits of lichen, bark or leaves. The height can be anywhere from 2 to 10 feet above ground. Nests have also been found on wind chimes, light fixtures and window ledges.
Hummers frequently build on the same site year after year.
Sometimes last year's nest will be used as a foundation for the new one. Babies are black when born. They have short bills that grow as they mature. When they have feathered out, young hummers exercise their wings. The whirring sound is audible from several feet away.