Crimson Giant Day Gecko: Characteristics, Behavior, Diet, Care, As Pet

Crimson Giant Day Gecko, known scientifically as Phelsuma grandis, is more than just a marvel in the world of reptiles. Their radiant crimson coloration, a stark contrast to their green counterparts, makes them a captivating addition to the rich biodiversity of geckos.

This color variant is not a different species, but a morph of the standard Giant Day Gecko developed through careful and strategic selective breeding. Just like their green siblings, they hail from the lush forests of Madagascar, where they spend their days basking in the sun, climbing trees, and hunting for insects and fruits.

However, their striking coloration makes them stand out from the crowd, adding a unique touch to the already fascinating world of these diurnal creatures.

Physical Characteristics

Crimson Giant Day Gecko

Crimson Giant Day Geckos are a prime example of how selective breeding can emphasize and enhance certain physical traits in a species. Measuring up to 12 inches in length, they share the robust physique and impressive size of the standard Giant Day Gecko.

However, they exhibit a stunning crimson coloration that ranges from a bright, fiery red to a deeper, more subdued shade. This color morph, while a purely aesthetic difference, adds a unique visual appeal to these geckos, making them a favorite among reptile enthusiasts.

Their physical features also include the same specialized toe pads found in all geckos, allowing them to scale smooth surfaces with ease. They have large, round eyes adapted for their diurnal lifestyle, providing them with an excellent color vision to spot prey and navigate their vibrant environment.

Origin and Breeding

Selective breeding is a strategic practice employed to emphasize certain traits in animals. The Crimson Giant Day Gecko morph is a testament to this practice’s success in the reptile world. Breeders identified and selected geckos with more red hues and bred them together.

Through generations of meticulous selection, the red trait became more pronounced, resulting in the striking crimson color we see today.

This fascinating journey of the Crimson Giant Day Gecko morph not only sheds light on the principles of genetics but also emphasizes the immense diversity that exists within a single species. However, this practice also calls for ethical considerations, making sure that the pursuit of aesthetic appeal does not compromise the overall health and well-being of these creatures.

Behavior and Lifestyle

Despite their striking physical differences, Crimson Giant Day Geckos share the same behavioral traits as their green counterparts. They are diurnal lizards, which means they are active during the day, spending their time foraging for food, soaking up the sun, and engaging in social interactions.

These geckos are skilled climbers, thanks to their specialized adhesive toe pads. They thrive in vertical spaces and spend a considerable amount of time in the canopy of their environment, hunting for insects and fruits.

Like other geckos, the Crimson Giant Day Gecko has a fascinating defensive mechanism – tail autotomy. This means they can drop their tail to distract predators, allowing them to escape unharmed. However, this process is stressful for the gecko and should be avoided in captivity.

Crimson Giant Day Gecko Lifespan

Their lifespan ranges from 8 to 20 years, a long-term commitment for any potential pet owner. However, it’s important to note that while they are beautiful and fascinating creatures, their care requirements are complex, and they should only be kept by experienced reptile keepers.

Crimson Giant Day Gecko Diet

Crimson Giant Day Geckos are omnivorous, feeding on a diet of insects, fruits, and nectar in the wild. In captivity, their diet should mimic this variety as closely as possible. They can be fed a range of insects, including crickets, mealworms, and waxworms.

It’s crucial to gut-load these feeder insects, meaning they should be fed nutritious food before being offered to the gecko. This process ensures that the gecko receives a nutrient-rich meal.

Apart from insects, these geckos also relish fruits. Mashed fruits or commercial fruit mixes can be offered, providing them with the necessary vitamins and minerals. In all cases, the food should be appropriately sized, ideally not larger than the width of the gecko’s head.

Giant Crimson Day Geckos as Pets

While the Giant Crimson Day Gecko is an attractive and fascinating reptile, it is not recommended for beginner reptile keepers due to its complex care requirements. These geckos are better suited for experienced reptile enthusiasts who are willing to commit to the long-term care and specialized housing needs of this species.

Enclosure Size Recommendations

The enclosure size for a single Giant Crimson Day Gecko should be no smaller than 18 inches long by 18 inches wide and 24 inches tall. For pairs or small groups, a larger enclosure is necessary. These geckos are arboreal and appreciate vertical space, so a taller enclosure with plenty of climbing opportunities is essential.

Interaction with Humans

Giant Crimson Day Geckos can become stressed when handled frequently, so it’s best to minimize handling to essential tasks such as cage maintenance or veterinary visits. It’s crucial to be gentle when handling these geckos, as they are fragile and may drop their tails as a defense mechanism.

They may also display territorial or aggressive behavior towards other geckos, especially males.

Are Crimson Day geckos good pets for beginners?

Crimson Day Geckos can make good pets, but they are not recommended for beginners due to their complex care requirements. They are better suited for experienced reptile keepers who are able to provide the specific environmental conditions these geckos need, such as high humidity, proper UVB lighting, and a varied diet.

Additionally, Crimson Day Geckos are not typically pets that enjoy being handled. They can become stressed when handled frequently, which can lead to health issues. They are more suitable as observational pets, offering their owners the enjoyment of watching their unique behaviors and appreciating their stunning coloration.

So, while Crimson Day Geckos can make good pets, they require a knowledgeable and dedicated keeper to thrive in a captive environment.

Giant Crimson Day Gecko Care

Feeding: Offer a varied diet of gut-loaded insects and mashed fruits or commercial fruit mixes. The food should be appropriately sized and should not be larger than the width of the gecko’s head. Dust insects with calcium and vitamin D3 supplements to ensure proper nutrition.

Habitat Setup: Provide a tall enclosure with plenty of climbing opportunities such as branches, vines, and live or artificial plants. Provide hiding spots in the form of cork bark or similar materials.

Handling Precautions: Minimize handling to reduce stress and avoid injury to the gecko. Be gentle and aware of their fragile nature.

UV Light Exposure: Provide adequate UVB lighting to ensure proper calcium metabolism and overall health.

Maintaining Proper Humidity

Giant Crimson Day Geckos thrive in high humidity environments, requiring humidity levels between 50 and 70%. To maintain proper humidity, mist the enclosure daily with water, focusing on the plants and décor.

Using a hygrometer to monitor humidity levels is essential to ensure the gecko’s health and well-being. It’s also important to provide a water dish for them to drink from and soak in when needed.

Frequently Asked Questions

How can I tell the difference between a male and female Giant Crimson Day Gecko?

Sexing Giant Crimson Day Geckos can be difficult, especially for juveniles. Adult males usually have broader heads and larger femoral pores compared to females. Additionally, males may have hemipenal bulges at the base of their tails, while females will not have these bulges.

How often should I clean the enclosure of my Giant Crimson Day Gecko?

A thorough cleaning of the entire enclosure should be done at least once every three months. However, regular spot cleaning to remove feces, uneaten food, and shed skin should be performed daily or as needed to maintain a clean environment for your gecko.

Can I house two Giant Crimson Day Geckos together?

It’s generally not recommended to house two males together due to their territorial nature. However, a male-female pair or two females can sometimes be housed together, provided there is ample space and hiding spots. It’s important to monitor their behavior closely and be prepared to separate them if aggression or stress becomes apparent.

What should I do if my Giant Crimson Day Gecko loses its tail?

Tail loss is a natural defense mechanism for geckos. If your gecko loses its tail, it’s essential to keep the wound clean and the enclosure sanitary to prevent infection. The tail will eventually regenerate, although it may not be as long or look the same as the original.


Giant Crimson Day Geckos are beautiful and engaging reptiles that can make rewarding pets for experienced reptile enthusiasts. Their complex care requirements and sensitivity to handling make them unsuitable for beginners.

However, with proper care, a suitable enclosure, and a commitment to their well-being, these stunning geckos can thrive in captivity and provide years of fascination and enjoyment for their dedicated caretakers.

By understanding their unique needs and respecting their nature, you can create a fulfilling life for your Giant Crimson Day Gecko and forge a bond with one of nature’s most captivating creatures.

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