Now that the weather is warming and the winter’s ice is melting wood frogs are emerging to mate and lay their eggs. The male wood frogs’ duck-like quacking calls can be heard where there are seasonal pools or wetlands in wooded areas. Often the pools contains large numbers of calling males; the females, apparently attracted to the calls, make their way to the pools where the males quickly grasp them in a nuptial embrace called amplexus. Wood frogs are normally a shade of brown with a darker, almost black, raccoon-like mask; they spend the warm months feeding on the forest floor. Wood frog egg masses are gelatinous masses in seasonal pools; as the embryos grow they appear as black spots within the eggs.
Here’s a link to New Hampshire Public Television’s “Wildlife Journal Junior” where you can listen to a Wood Frog’s call.