Islands have a lot of different butterflies, and studying them can help us understand biodiversity. In China's Zhoushan Archipelago, researchers looked at butterfly communities to see how they are different from each other. They found that the types of butterflies and their traits can give us different information about biodiversity. The size and location of islands, the climate, and how butterflies are spread out all play a role in shaping biodiversity. Some islands have more similar butterflies, while others have more variety. The researchers also found that common butterflies can make biodiversity seem lower, but rare butterflies help make things more diverse. Overall, studying both the types of butterflies and their traits can help us learn more about biodiversity on islands.