Cranque_des_Epices saidIguanas are anything but pests. They eat bugs. We'd be inundated without them.
No, they are herbivores. The ones we have here are mostly Green Iguanas, that climb trees and are good swimmers. They eat up gardens. We even found a medium-sized one that had somehow climbed up to our second-floor patio and was eating our herbs we have in planters.
The insect eaters are the small lizards, and they do a good job of control year-round. I see fewer insects in south Florida, and especially flying insects except for 1 season of the year, than I do in many other States to the colder north.http://en.wikipedia.org/wiki/Green_Iguana
From this link:Due to a combination of events, the Green Iguana is considered an invasive species in South Florida...
They often destroy gardens and landscaping. They seem to be fond of eating a native endangered plant, Cordia globosa and feeding on Nickernut (Caesalpinia) a primary food plant of the endangered Miami Blue Butterfly (Cyclargus thomasi bethunebakeri); additionally on Marco Island, Green Iguanas have been observed using the burrows of the Florida Burrowing Owl, a species of special concern, all of which can make them more of a serious threat to Florida's ecosystem than originally believed.
In January 2008, large numbers of feral iguanas in Florida dropped from the trees in which they lived, due to uncommonly cold nights causing them to go into brumation in which they lost their grips on the tree branches. Though no specific numbers were provided by local wildlife officials, local media described the phenomenon as a "frozen iguana shower" in which dozens "littered" local bike paths. Upon the return of daytime warmth many (but not all) of the iguanas "woke up" and resumed their normal activities.This occurred again in January 2010 after a prolonged cold front once again hit southern Florida.