The National Weather Service in Miami issued an unofficial warning earlier this week for possible "falling iguanas" thanks to Florida's cold spell.

Iguanas will climb up trees at night to rest. They are cold-blooded and when temperatures fall into the 40s, they can stiffen up and fall to the ground, appearing to be dead – but they are not.

According to the Florida Fish and Wildlife Conservation Commission, green iguanas are an invasive species and are not native to Florida. Green iguanas were first found in the Miami-area in the 1960s.

Male green iguanas can grow to over five feet in length and weigh up to 17 pounds.

A ‘Frost Advisory’ was issued for Southwestern Florida on Wednesday as temps dipped into the mid-30s in some locations.

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