Here are some more curious facts about hummingbirds.
Female hummingbirds build their nests on top of limbs of deciduous trees.
The tiny nests are the size of a 50-cent piece. They are made of downy plant fibers, such as the fluff from cattails, with lichen on the outside to help disguise it. The nest is held together with spider web strands. Hummingbirds dine on baby spiders while they're stealing strands from the webs, but occasionally they get caught in the webs themselves. Hummingbirds, like most kids, love sugar.