A pupa is a life stage of certain insects, such as butterflies and beetles, that occurs between the larval and adult stages. During this phase, the insect undergoes significant transformation, often referred to as metamorphosis. The pupa is usually a non-feeding stage, where the larva's body is reorganized to develop into its adult form. Pupae can take various forms, including chrysalises for butterflies and cocoons for moths. This stage is crucial for the insect's development, as it allows for the complex changes needed to emerge as a fully formed adult. The duration of the pupal stage can vary depending on the species and environmental conditions.