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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

Spotted Salamander Ambystoma maculatum

Status: Wisconsin – Locally abundant
Minnesota – Status to be determined
Spotted Salamander
Size at hatching, 12 -17 mm; at metamorphosis, 49 - 60 mm total length

field map
The Spotted Salamander is present only in the northeastern part of our range (where it is sympatric with up to two other mole salamanders). Females deposit eggs in a firm oval mass (60–100 mm in diameter) attached to vegetation near the surface of the water. The eggs (1–250 per mass) are black, but the egg mass may be clear or milky, with a greenish hue because of symbiotic algae. The larvae have a light chin and throat with a dull dorsum and tail fin lacking blotches. Spotted Salamanders gain their spots shortly after metamorphosis.

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Page Last Modified: December 29, 2010