Sanzinia madagascariensis (Duméril & Bibron, 1844)

Adult Length

Adults of Sanzinia madagascariensis average 122–152 cm (4–5 feet) in length, and specimens measuring 183–213 cm (6–7 feet) are not uncommon.

Morphological Features

This species has thermoreceptive pits between its labial scales, and females grow larger than males.

Color and Baseline Distribution

It is greenish in color, and is found on the eastern side of Madagascar.

Endemism and Type Locality

Sanzinia madagascariensis is endemic to Madagascar, and its given type locality is simply "Madagascar".

Habitat Preference

It favors living in trees and shrubs located near streams, rivers, ponds, and swamps.

Reproductive Mode

This species is ovoviviparous.

Litter Size and Newborn Length

Females give birth to up to 12 young at a time, each newborn measures around 38 cm (15 inches) in length.

Gravid Female Color Change

When females become gravid, their skin color darkens.

Adaptive Purpose of Darkening

This darkening is an adaptation that allows increased heat absorption for the developing young.

Post-Birth Color Reversion

After giving birth, the female's skin color returns to normal as soon as she sheds her skin next.

Neonatal Coloration and Function

Newborn neonates are bright red; this coloration may warn predators to stay away, while also providing camouflage among brightly colored treetop flowers.