Red River Mudpuppy vs. Western Lesser Siren

Both are gilled, fully aquatic salamanders caught by anglers and in traps (records share 12 one-degree squares). A: Four legs: hind legs present in the Red River Mudpuppy; only two small front legs; no hind legs at all in the Western Lesser Siren. B: Stout, with a flat square head and bold dark spots in the Red River Mudpuppy; long and eel-like, dark grey to olive, with tiny dots in the Western Lesser Siren.

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

More comparisons

• Red River Mudpuppy vs. Common Mudpuppy
• Red River Mudpuppy vs. Hellbender
• Red River Mudpuppy vs. Eastern Tiger Salamander
• Three-toed Amphiuma vs. Red River Mudpuppy
• Common Mudpuppy vs. Western Lesser Siren
• Three-toed Amphiuma vs. Western Lesser Siren
• Two-toed Amphiuma vs. Western Lesser Siren
• One-toed Amphiuma vs. Western Lesser Siren

Wildsight identifies the reptiles and amphibians of the United States. Every comparison