|adult spring peeper in hand for size reference|
|adult spring peeper in wetland|
|spring peeper - identifying marks: X on back, toe pads, small size, light color|
It is exciting to hear a full chorus of spring peepers - I haven't heard this large a group calling in the city since I first moved to Duluth. About 10 years ago the spring peeper population seemed to be greatly reduced (based on calling activity), likely due to a cold winter with little snow cover. Spring peeper overwinter in leaf litter or bark, but are not as freeze-tolerant as wood frogs.
I heard spring peepers in northern Wisconsin as well, but today was my first visit to that area.