FWIW Iguanas are really common in South Florida but are a non-native invasive species. They were brought up from the Caribbean and Central America as stowaways on trading/rum ships. South Florida is the tropics/subtropics so 95% of the time we have tropical weather with the exact same weather as the Caribbean/C America but we occasionally we get this cold air (38F at my house in Miami this morning) that the Caribbean/C America never experiences. The cold blooded Iguanas which live in the crowns of palm trees essentially "freeze" up solid and fall out at hit people in the head. Seriously. If the iguanas are on the ground when they "freeze" you could literally just pick them up with your hand.