This is a photograph of a nest in a tree. It presumably belongs to either a bird or a squirrel.
This nest could inspire a number of poetic ideas, including poems about:
Homes (as the nest is like a home)
Collection (as the nest is a collection of items)
Recycling (as the nest uses some recycled materials in that the materials may have fallen from a tree, for example, and then were used by the animal that built the nest)
Uncertainty (as it is uncertain what built the nest)