Non-native species are organisms that are introduced to a new environment where they do not naturally occur. This can happen through various means, such as human activities, accidental transport, or natural events. These species can be plants, animals, or microorganisms that may thrive in their new surroundings. While some non-native species can coexist peacefully with local ecosystems, others may become invasive. Invasive species can outcompete native species for resources, disrupt food chains, and alter habitats. Examples of non-native species include the Burmese python in the Florida Everglades and the zebra mussel in the Great Lakes.