Nest

A nest is a structure built by certain animals to hold their eggs or young. Although nests are most closely associated with birds, members of all classes of vertebrates and some invertebrates construct nests. They may be composed of organic material such as twigs, grass, and leaves, or may be a simple depression in the ground, or a hole in a rock, tree, or building.

Human-made materials, such as string, plastic, cloth, or paper, may also be used.
Nests can be found in all types of habitat.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY 2.0

TRACKWISE

Read the ground — animal tracks, gaits, and field-tracking know-how.

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Museum entries, images, and facts are drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses.