Variable Kingsnake (Jaguar Phase)

Variable Kingsnake (Jaguar 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 Jaguar Phase Variable Kingsnake is a selectively bred colour line recognized for its irregular, fragmented blotch pattern that resembles the rosettes of a jaguar. This phase often displays warm golden, tan, or orange ground colours with dark brown to black broken markings outlined by lighter borders. In some individuals, the pattern is heavily reduced, forming scattered clusters or chain-like markings along the spine. The eyes are dark with light irises, adding a striking, alert expression. Each snake is unique, reflecting the inherent variability that gives the species its name. The overall look is both natural and refined, evoking the appearance of a miniature desert cat in reptile form.

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: Calm, curious, and responsive, these snakes are known for their intelligent behaviour and ease of care. They adapt well to handling and make excellent display animals due to their active yet manageable nature.

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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. Variable Kingsnakes are dependable feeders and rarely refuse meals.

Behaviour in Captivity: Active, observant, and adaptable, these snakes respond well to routine care. They are gentle once acclimated and display well in naturalistic setups.

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

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Genetics Note

Jaguar Phase (Polygenic Selective Trait): A selectively bred line emphasizing irregular, broken blotch patterns and a golden to tan base colour. The trait mimics the rosetted patterning of a jaguar, varying from cleanly disrupted saddles to complex, linked clusters.

Polygenic Nature: The Jaguar Phase is polygenic, inherited through multi-generational selective breeding rather than a single-gene mutation. Expression varies widely, with some individuals exhibiting heavy pattern disruption while others display minimal markings or faint rosettes.

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Genetic Combination Summary

The Variable Kingsnake (Jaguar Phase) expresses a polygenic pattern trait:

• Jaguar Phase (Polygenic): Produces broken or rosetted blotch patterns with warm golden or orange tones.

This line showcases the intricate natural variability of the species, combining refined colouration with bold, unpredictable patterning. The Jaguar Phase Variable Kingsnake is valued for its individuality and artistic, desert-inspired appearance that captures the wild essence of its Mexican highland origins.