Northern Dwarf Siren vs. Lesser Siren

Lesser Sirens live in the same weedy ponds and ditches. A: A pale stripe along each side in the Northern Dwarf Siren; no side stripes on adults; fine black dots in the Lesser Siren. B: Small (4 to 6 in) and slender with a small, pointed head in the Northern Dwarf Siren; bigger (to 27 in) with a broader head and bushy gills in the Lesser Siren. Count the toes on a front foot: three on the dwarf siren, four on the Lesser. Young Lesser Sirens can have a pale side stripe too.

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