Rare species are organisms that exist in limited numbers and are often at risk of extinction. These species can be plants, animals, or microorganisms, and their rarity can be due to various factors such as habitat loss, climate change, or overexploitation. Conservation efforts are crucial to protect these species and their habitats. The classification of a species as "rare" can depend on its population size, geographic distribution, and ecological requirements. Organizations like the International Union for Conservation of Nature (IUCN) assess species and categorize them based on their risk of extinction, helping to prioritize conservation actions.