Generate an interesting trivia question about frogs.
What unique physical ability do some species of frogs possess that allows them to change color for the purpose of thermoregulation, communication, or camouflage?
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate an interesting trivia question about frogs.

### Output:
What unique physical ability do some species of frogs possess that allows them to change color for the purpose of thermoregulation, communication, or camouflage?