A nest is a structur biggit bi certain ainimals tae hauld its eggs, its offspring, or occasionally the ainimal itsel. Awtho nests are maist closely associatit wi birds, members o aw classes o vertebrates an some invertebrates construct nests. Thay mey be componed o organic material such as twigs, gress, an leaves, or mey be a simple depression in the grund, or a hole in a rock, tree, or biggin. Human-made materials, such as string, plastic, claith, or paper, mey an aa be uised. Nests can be foond in aw teeps o habitat.