As temperatures plummet across the southeastern U.S., Florida’s iguanas are in for a rude surprise. Overnight lows are expected to drop to the mid-30s Fahrenheit or even into the 20s in some parts of the state. Green iguanas, not native to the U.S. but introduced in the 1960s, are struggling to cope with the cold. These lizards, which can grow over five feet in length, are used to the consistent temperatures of Central and South American rainforests, making the Florida chill a shock to their system.
The phenomenon of iguanas falling from trees due to cold shock has become infamous in Florida. When temperatures drop below 50 degrees Fahrenheit, these tropical lizards can experience a cold shock that causes them to lose their grip and tumble to the ground. However, experts assure that unless the fall is from a great height, the iguanas are likely to recover once the sun comes out and warms the air.
Despite being an introduced species, the cold snap in Florida provides valuable insights into how animals respond to new climates. Scientists like James Stroud from the Georgia Institute of Technology have been studying the iguanas during cold snaps to understand their ability to adapt to changing conditions. In a study conducted during a 2020 cold snap, researchers found that iguanas that experienced the chill became more tolerant of cold temperatures, hinting at potential evolutionary responses to environmental changes.
Stroud is now exploring whether this increased tolerance is a result of evolution or simple adaptation. By studying how these non-native tropical lizards respond to extreme events like cold snaps, scientists can gain valuable insights into how species adapt to new climates. And for Floridians concerned about cold-shocked iguanas, rest assured that these resilient creatures are likely to bounce back once the temperatures rise.
The unique situation in Florida serves as a real-world example of how species can respond to unfamiliar climates, shedding light on the mechanisms of evolution and adaptation. As temperatures fluctuate due to climate change, understanding how animals like iguanas cope with extreme events becomes increasingly important for conservation efforts.
