Merck Manual

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Probing snakes to identify gender
Probing snakes to identify gender

Probing snakes to identify gender. Top: A lubricated (water-soluble), blunt sexing probe is inserted caudally into either side of the cloaca (arrow). Middle: In males, the probe enters into one of the hemipenal sulci to a depth of 6–14 subcaudal scales. Bottom: In females, the probe enters one of the cloacal glands to a depth of <6 subcaudal scales.

Courtesy of Dr. Stephen Divers.

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Overview of Reptiles