Protected areas are a cornerstone of in situ conservation and include national parks, bioreserves, and sanctuaries. They are managed areas dedicated to protecting biodiversity. The International Union for Conservation of Nature has established seven categories of protected areas and guidelines for their management. India has over 600 protected areas covering a variety of ecosystems and hosting many endangered species. These areas help maintain biodiversity through conserving habitats and genetic diversity. Biosphere reserves specifically aim to balance conservation and sustainable development through zoning of areas for strict protection and various levels of human involvement. India has established 18 biosphere reserves recognized for their unique biodiversity and ecosystems.