Brazos River Watersnake vs. Diamondback Watersnake

Both live in the upper Brazos River; the Brazos River Watersnake keeps to shallow, rocky riffles. A: Four rows of small dark spots, alternating, on olive-brown in the Brazos River Watersnake; a dark chain-like net of diamonds in the Diamondback Watersnake. B: Small: 16 to 32 in in the Brazos River Watersnake; big and heavy: 30 to 48 in in the Diamondback Watersnake. The Brazos River Watersnake's belly is pinkish-orange with a row of small dark spots along each edge; the Diamondback's yellow with dark half-moons.

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

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