Red River Mudpuppy vs. Eastern Tiger Salamander
Young mudpuppies are taken for gilled tiger salamander larvae ('waterdogs'), the Kansas Herpetofaunal Atlas notes (records share 4 one-degree squares). A: A narrower head with a dark stripe through the eye in the Red River Mudpuppy; a broad, rounded head with no eye stripe in the Eastern Tiger Salamander. B: Low, only on the tail in the Red River Mudpuppy; high, running forward onto the back in the Eastern Tiger Salamander. Hind feet: the mudpuppy has four toes on each hind foot, a tiger salamander larva five. Tiger larvae live in ponds and fishless pools and turn into land salamanders; mudpuppies live in rivers and lakes all their lives.
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