Intruders: Wild by Nature (2001)

Many animals - whether imported on purpose or accidentally - have similarly supplanted local fauna in areas where they were introduced. The problem of animal invaders is one of today's most serious environmental threats. The potential risks are so great that the issue is now a major concern of the International Union for Conservation of Nature and Natural Resources, the world's largest environmental protection organization. With astounding footage from around the world, "Invaders" not only offers us an opportunity to reflect on Life, but also a chance to grasp this unprecedented peril facing the Earth and the diversity of species.