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Common Mudpuppy vs. Western Lesser Siren

Both keep their gills for life. Count the legs: a Mudpuppy has four, with four toes on each foot. A Western Lesser Siren is eel-like, with a pair of tiny front legs and no hind legs at all. Siren lives in muddy, weedy still water in southwestern Indiana.

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Common Mudpuppy

Necturus maculosus

Western Lesser Siren

Siren nettingi
Common Mudpuppy vs. Western Lesser Siren: comparison sheet with the differences marked

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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