Reptiles become immobile due to low temperatures.
The U.S. National Weather Service has warned Florida residents that because of the cold to four degrees of heat iguanas freeze and in a daze may fall from the trees on the heads of passersby. This is reported by USA Today.
The weather service notes that iguanas are cold-blooded animals. They slow down or become motionless when temperatures drop to four degrees or below. The animals may fall from trees, but that doesn’t mean they’re dead.