Bird nest
The smallest cup nests are made by hummingbirds. They can be as tiny as a thimble, like the bee hummingbird's nest. That tiny nest holds eggs that are as tiny as peas. The largest cup nest is probably the stork's. His nest can be nine feet deep and six feet wide. The stork's nest is so big that smaller birds actually make nests in its cracks, holes, and branches.