Green Iguana is a bit of a misnomer. Sure, they can be green, but they can be a variety of other colors as well. In fact, the male of the duo that I saw was more of an orange color than anything else, which makes sense because it is the males that are more likely to be a different coulor.
Green Iguanas range from southern Mexico and the Caribbean islands to South America and are relatively common. The biggest threats to their continued survival in the wilderness are habitat destruction and hunting, for both food and for the pet trade (though they are not considered in the least bit endangered).