Reports have come in of wood frogs (Rana sylvatica) calling south of Duluth (around Solon Springs, WI) AND north of Duluth. So now I am waiting for them to start calling here!
One wood frog sounds like 'quark-quark-quark' and a full chorus of wood frogs make a huge racket.
Listen to this chorus of wood frogs heard about this time two years ago:
Wood frogs will call during the day as well as evening and night. Listen for them on your next walk through the woods or local parks- pretty much anywhere that there are small to medium wetlands.