MIAMI - It's a South Florida phenomenon that draws amusement from across the country — when temperatures drop below a certain level, cold-stunned iguanas start falling out of trees. While it may sound bizarre, it happens. And there's a scientific reason for it.

Southwest Florida is known for its warm, tropical climate and sunny weather. However, even paradise can have its chilly moments. Here's a look at the coldest temperatures ever recorded in three coasta

Although several iguana species live in Florida, the predominant one is the green iguana, native to Central and South America. According to the Florida Fish and Wildlife Conservation Commission, green iguanas are considered invasive in the state.

When temperatures drop in South Florida, it can cause a big problem for Floridians: falling iguanas. When it gets too cold, the large invasive reptiles — which can grow to be up to 5 feet long and 20 pounds — get stunned by the temperatures and will often fall out of trees onto the ground or whatever may be passing by below.