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Description
Lake Chapala Garter Snake (Normal)
Scientific Name: Thamnophis eques obscurus
Common Name: Lake Chapala Garter Snake
Species Overview
Size: Adults typically reach 2.5–3.5 feet (0.75–1.1 m) in length, with a slender, semi-aquatic build and keeled scales that give a matte finish.
Appearance: The Normal Lake Chapala Garter Snake displays the classic three-striped pattern common to many Thamnophis species, but with especially rich colouration. The dorsal stripe is golden to yellow-orange, bordered by darker olive or brown tones that fade into cream or tan along the sides. The head is often copper or olive, while the underside features a pale yellow or light grey checker pattern. These snakes can vary subtly in colour based on locality, temperature, and age, with some individuals showing more pronounced yellow or bronze tones. Their graceful form and vibrant striping make them one of the most visually appealing garter snakes native to Mexico.
Distribution: Native to the Lake Chapala region in west-central Mexico, this subspecies inhabits wetlands, grassy shorelines, and lowland forests surrounding freshwater lakes and rivers.
Habitat: Lake Chapala Garter Snakes inhabit humid, temperate environments with consistent access to water. In captivity, they thrive in naturalistic terrariums with soft substrate, climbing décor, and secure hiding areas, along with a large water dish for soaking.
Behaviour: These snakes are diurnal and alert, frequently active during the day. They are quick, intelligent, and observant, showing strong feeding responses and adapting readily to captivity. Once accustomed to handling, they are calm and curious, making them excellent display animals.
Captive Care
Enclosure: Provide an enclosure at least 3–4 feet in length for adults, with natural décor such as rocks, branches, and multiple hides. Use soft, moisture-retaining substrate such as soil, coconut fibre, or cypress mulch. Always include a large, clean water dish for soaking and hydration.
Temperature & Humidity: Maintain a daytime gradient of 75–85°F (24–29°C) with a basking area near 88°F (31°C). Allow nighttime drops to 68–72°F (20–22°C). Maintain humidity between 60–75%, providing clean, dechlorinated water daily.
Diet: Offer a varied diet that includes thawed rodents, earthworms, fish (avoid high-thiaminase species), and frogs. While these snakes can adapt to a rodent-only diet, they thrive best on a diverse menu that mirrors their natural feeding habits. Due to their fast metabolism, juveniles should be fed every 2–3 days and adults every 3–5 days.
Behaviour in Captivity: Lake Chapala Garter Snakes are lively, inquisitive, and responsive. They remain active throughout the day, regularly basking and exploring. Their quick feeding response and calm demeanour make them rewarding to maintain.
Special Considerations: These snakes may be housed singly or in small groups, but close supervision is required during feeding. Always separate or monitor individuals during mealtime to prevent competition or accidental bites. Clean water should be available at all times for soaking and drinking.
Genetics Note
The Lake Chapala Garter Snake exhibits significant natural colour and pattern variation, ranging from olive-brown individuals with golden stripes to brighter yellow and bronze morphs depending on locality. In captivity, selective breeding has enhanced certain colour traits, including lighter gold striping and high-contrast patterns. Albino forms have also been developed, replacing the dark pigment with vibrant cream and orange hues.
Species Summary
The Lake Chapala Garter Snake (Thamnophis eques obscurus) is one of the most valued and well-recognized garter snakes in herpetoculture. Its combination of striking natural striping, active temperament, and adaptability makes it a favourite among keepers who appreciate lively, intelligent snakes that thrive on a varied diet and regular interaction.