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Lend us your ears! Volunteers sought for frog survey

  • ##Frogs like this Blanchard’s cricket frog call as part of their courtship, and for the past 35 years, a small army of volunteers have ventured out in the dark to listen for frog calls in seasonal wetlands, marshes, lakes, and rivers. The information they collect is critical to help DNR conservation biologists define the distribution, status, and population trends of all 12 frog and toad species in Wisconsin. DNR is now seeking volunteers for 2019 surveys. Learn more and get involved!Photo by Rori Paloski
  • ##Volunteers survey along a pre-set route for three nights, once each in early spring, late spring, and early summer. Volunteers make 10 stops per night (five minutes at each site) and document the species heard calling and the relative abundance of each species.

    Or volunteers can do a phenology survey and monitor one wetland throughout the frog calling season or a mink frog survey in which volunteers listen for frog calls in the day and at night along set routes in June and early July.DNR file photo
  • ##The resurgence of American bullfrogs in Wisconsin have been documented over the past 35 years thanks in part to documentation from Wisconsin Frog and Toad Survey volunteers. Bullfrogs are Wisconsin’s largest frog. Photo by Andrew Badje
  • ##Wood frogs are known as “explosive breeders” because they breed in a short, 1-2 week window each spring. Individual egg masses are all laid in the same area of an ephemeral wetland. Photo by Ryan Brady
  • ##Spring peepers are Wisconsin’s most documented species in the Wisconsin Frog and Toad Survey. They breed in ephemeral ponds statewide and are found in the summer under forest canopies. Photo by Andrew Badje
  • ##The Blanchard’s cricket frog is Wisconsin’s only endangered amphibian. Wisconsin Frog and Toad Survey volunteers have documented their expansion along the Mississippi River in recent years. Photo by Tyler Brandt
  • ##American toads are one of Wisconsin’s more urban species of anuran (known collectively as frogs and toads). Photo of male in amplexus with a larger female. Amplexus is a mating behavior in frogs and toads where eggs are fertilized externally. Photo by Rori Paloski
  • ##Gray treefrogs are quite often found in urban settings on windows and siding of houses, near light sources, where they can find plenty of insects to eat during the summer. Gray treefrogs can change color to better resemble their background for camouflage, from bright green to a mottled gray color. Photo by Victor Starostka
  • ##The mink frog is a species of special concern in Wisconsin. In recent years, volunteers have been helping DNR document populations in Wisconsin to better document their range and distribution on northern lakes and bogs. Photo by J. Paul White
  • ##The northern leopard frog, identified by its leopard-like appearance, is a federal species of concern, meaning its populations are low or declining. Volunteers have documented a decline over the 35-year history of the Wisconsin Frog and Toad Survey. Photo by Rich Staffen
  • ##Want to know what frog species are calling where you live? Download and print off our new brochure to help identify the wildlife you see and hear, and to report your observations to DNR conservation biologists. Hear the actual frog calls and learn more about each species in these 60-second videos on the Wisconsin Citizen-based Monitoring Network playlist.
Last Revised: Tuesday November 6, 2018