Ever wonder what can happen when an exotic pet is released or escapes into the wild? The outcome depends on both the pet and the location of their release, but invariably there are disatrous consequences. The National Geographic Online reports that:

"Invasive species are a leading cause of species endangerment and extinction [second only to habitat loss] both in the United States and worldwide. Almost half of the species on the U.S. endangered species list are threatened wholly or partly by introduced species. Steven A. Williams, director of the U.S. Fish and Wildlife Service, calls invasive species the number one environmental threat to the United States." (Source: National Geographic News)

From Burmese pythons in the Everglades to leopards in the British countryside, exotic species know no boundaries when they escape into a new environment. There are countless case studies in which invasive species have wrought unmitigated damage to local populations. For insight into a few scenarios, see:

• Huge, freed pet pythons invade Florida Everglades
• Leopards are prowling Britain
• Big cats prowl British countryside
• Zebra mussels in Great Lakes Region

For additional information on the topic of invasive species, refer to Invasive Species Monitoring Resources.