Invasive Species

We so often worry about endangered or threatened species that we don't often think about "invasive species" -- those that move outside of their native habitat to cause problems for other ecosystems. In other words, species that are too successful.

The Invasive Species Weblog documents such species that have been introduced to alien habitats by accident, natural expansion, or through ill-conceived releases. The species often go on to spread disease, threaten the indigenous wildlife, and even cause economic damage. Invasive species are yet another unintended consequence of globalization and lack of attention paid to the environment.

Source: WorldChanging