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Upper Midwest Environmental Sciences Center

Farm ponds as critical habitats for native amphibians
A Field Guide to Amphibian Larvae and Eggs of Minnesota, Wisconsin, and Iowa
Field guide contents

Figure 2. Field key to amphibian eggs.

Field key to amphibian eggs.

Figure 2a. Frog and toad eggs. Dark lines represent distinct egg envelope borders, gray lines represent indistinct borders.

Figure 2a. Frog and toad eggs. Dark lines represent distinct egg envelope borders, gray lines represent indistinct borders.

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Page Last Modified: December 29, 2010