🐸Happy World Frog Day!🐸 One of the first and surest signs of spring is the sounds of small frogs singing in vernal pools and ponds across the Midwest. Two of the most common early spring singers are wood frogs (Lithobates sylvaticus) and spring peepers (Pseudacris crucifer). Both species of frogs gather in large numbers at small, still bodies of water, where the males sing loudly to attract females. Wood frogs sound like a bunch of clucking chickens or quacking ducks, while spring peepers' son