Take a listen! Alien frogs? Lake submarines? UFOs? While it sounds like you're in a Star Wars movie, these pings & boings coming from Sippo Lake are completely natural! People often say, "The lake is singing," when this phenomenon happens. With the temperature changing, the ice on the lake is expanding, contracting, and moving causing these sounds we certainly aren't used to hearing in nature. What you can hear from this changing ice depends on how far away you are. We are very lucky that on Sun

California red legged frog - Alchetron, the free social encyclopedia