Iguanas love sunbathing
Just like all reptiles, iguanas are cold-blooded and thrive in hot climates. That's why you'll often see them basking in the warm sunlight.
Whenever the temperature drops below 40 degrees Fahrenheit, the lizards' muscles essentially become paralyzed and they fall into a state of hibernation. This doesn't happen often in the hot tropics of Central America, but in places like southern Florida, where they've been introduced by humans, an unseasonable winter cold snap can literally cause scores of these scaled critters to lose their grip on tree limbs and fall to the ground.
While it's quite an alarming sight to witness, the tumble doesn't necessarily mean certain death. As the National Weather Service in Miami explains in the video above.