page_title: Nest
section_title: Amphibians
hierarchical_section_title: Nest / Nest builders / Amphibians
caption_attribution_description: Author: Tenn Hian-kun Description: Paradise fish's spawn under the hatching process
context_page_description: A nest is a structure built for certain animals to hold eggs, offspring, and, often, the animal itself. 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.
  Nest building is driven by a biological urge known as the nesting instinct in birds and mammals. Generally each species has a distinctive style of nest. Nest complexity is roughly correlated with the level of parental care by adults. Nest building is considered a key adaptive advantage among birds, and they exhibit the most variation in their nests ranging from simple holes in the ground to elaborate communal nests hosting hundreds of individuals. Nests of prairie dogs and several social insects can host millions of individuals.
context_section_description: Some species of frog build nests ranging from simple to modest complexity.  Many stream-dwelling frogs lay their eggs in a gelatinous mass which they attach to underwater vegetation.  The jelly structure prevents the eggs from washing away.
caption: Paradise fish begin to hatch from a bubble nest.
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