text:  The sound you are hearing is not a bird or a cricket. It's a tiny koki frog, which only calls at night. Koki are not native to our island. With no natural predators, they are multiplying quickly and spreading. We could soon have more than 10,000 frogs per acre, devastating native ecosystems and shattering our evening peace. You can help protect Kauai by reporting koki frogs to the Kauai Invasive Species Committee at 246-0684. That's 246-0684.