The term endemic species refers to organisms that are native to and restricted to a specific geographical area. These species evolved in isolation and are not found naturally anywhere else in the world. Endemic species are significant for biodiversity because they often adapt to unique local environments, contributing to ecological complexity. They can be vulnerable to threats like habitat loss, climate change, and invasive species, making their conservation vital for maintaining local ecosystems and overall biodiversity. Their presence is often used as an indicator of environmental health.