Notes

Sometimes, people bring animals from one part of the world to another. When species begin to live in a place where they are not native, they are called introduced animals. People bring some animals to new homes on purpose. Often, they have a plan to use the new animals to help them, or sometimes they arrive at their new homes by accident. These animals stow away on ships or planes. A new species which can cause problems in its new home is called an invasive species.