I got a chance to photograph some newly hatched tegu's not long ago. Tegu's are lizards from South America and can get up to 5ft in length. Unfortunately through the pet trade they have made their way to Florida and are expanding rapidly in the wild. Many biologists believe they may become a serious problem for native wildlife, you can learn more on the subject here
As big of a problem as they may be, there is no denying that they are pretty awesome looking, esspcially the young with their green heads!