Variable Kingsnake (Orange Phase)

Variable Kingsnake (Orange Phase)

Scientific Name: Lampropeltis mexicana thayeri
Common Name: Variable Kingsnake, Thayer’s Kingsnake

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Species Overview

Size: Adults typically reach 2.5–3.5 feet (0.75–1.1 m) in length, with a slender, agile body and smooth, glossy scales.

Appearance: The Orange Phase Variable Kingsnake is a selectively bred colour form that emphasizes bright orange and tangerine hues over the species’ natural pattern. Typically, this form displays a rich orange background colour with darker orange, rust, or brown blotches outlined in thin grey or cream borders. Some individuals exhibit near-solid orange tones with faint patterning, while others retain partial blotching that blends softly into the background. The scales reflect light with a metallic sheen, and the eyes are dark with warm undertones that complement the overall hue. This selectively bred phase highlights the species’ natural tendency toward pigment variability and has become one of the most visually appealing colour expressions of the Variable Kingsnake.

Distribution: Originates from selective captive breeding of Variable Kingsnakes, a species native to the highlands of northeastern Mexico, primarily in Coahuila, Nuevo León, and Tamaulipas.

Habitat: Variable Kingsnakes inhabit rocky slopes, semi-arid forests, and grassland valleys in northern Mexico. In captivity, this morph thrives in naturalistic terrariums with soft substrate, climbing branches, and secure hiding areas.

Behaviour: Variable Kingsnakes are calm, intelligent, and responsive to regular handling. They are hardy, easy to maintain, and known for their excellent feeding responses, making them ideal for both display and breeding setups.

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Captive Care

Enclosure: Provide an enclosure at least 3 feet × 18 inches × 18 inches for adults. Include multiple hides, climbing décor, and smooth furnishings. A naturalistic substrate such as soil, coconut fibre, or aspen allows burrowing and helps regulate humidity.

Temperature & Humidity: Maintain a daytime gradient of 78–85°F (25–29°C) with a basking area near 88–90°F (31–32°C). Allow nighttime drops to around 70°F (21°C). Maintain humidity between 45–60%, offering a humid hide during shedding.

Diet: Offer frozen-thawed rodents every 7–10 days for juveniles and every 10–14 days for adults. These kingsnakes are reliable feeders and rarely refuse meals.

Behaviour in Captivity: Active, observant, and well-tempered, Variable Kingsnakes thrive in stable environments. Their moderate size and consistent feeding make them excellent for both hobbyists and serious collectors.

Special Considerations: Kingsnakes should always be housed individually, as they may consume other snakes.

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Genetics Note

Orange Phase (Polygenic Selective Trait): A selectively bred line emphasizing orange and tangerine pigmentation over the natural grey and brown tones of the species. This trait enhances the warm coloration while often reducing black outlining, producing a more uniform, sunlit appearance.

Polygenic Nature: The Orange Phase trait is polygenic, meaning expression varies among individuals. Some display deep tangerine hues with subtle patterning, while others show high-saturation orange with reduced contrast. Continued selective breeding refines this trait over multiple generations.

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Genetic Combination Summary

The Variable Kingsnake (Orange Phase) expresses a selectively bred polygenic colour enhancement:

• Orange Phase (Polygenic): Intensifies orange pigmentation and reduces dark patterning for a warm, vibrant overall appearance.

This line exemplifies the natural colour diversity of the Variable Kingsnake while highlighting the vivid potential achievable through careful selection. The Orange Phase Variable Kingsnake is valued and highly regarded for its bright, consistent coloration and calm, reliable nature in captivity.