The Madagascar giant day gecko is a large, vivid emerald-green, diurnal gecko from northern Madagascar, often marked with red flecks.
Unlike most pet geckos it is active and brightly coloured in daylight, which makes it a striking display animal, but it is a look-don't-touch species with delicate, tear-prone skin.
It is more demanding than the nocturnal beginner geckos because it genuinely needs strong UVB, a basking gradient and high humidity.
It suits keepers who want a planted vivarium to observe rather than a gecko to handle, and rewards good husbandry with bold, interesting behaviour.
Housing
Provide a tall, well-planted vivarium of at least 45x45x60cm for one adult, furnished with bamboo, broad-leaved live plants and cork for climbing and basking.
As an arboreal, diurnal species it needs both vertical space and bright lighting, so a bioactive planted setup suits it well.
Maintain a basking spot of around 30-32C with a cooler ambient of 24-26C, and provide a moderate-to-high output UVB tube, which is essential for this sun-loving lizard.
Keep humidity around 60-80% by misting once or twice daily, allowing partial drying between mistings to prevent stagnant, mouldy conditions.
Diet
Day geckos are omnivores.
Feed gut-loaded, calcium-dusted live insects such as crickets, dubia roaches and locusts several times a week, sized no larger than the space between the eyes.
Alongside insects, offer a commercial day-gecko nectar or a crested-gecko-style fruit diet a couple of times weekly to mimic the pollen, nectar and soft fruit they take in the wild.
Supplement with calcium and vitamin D3 on a regular schedule to support their fast metabolism and coloration.
Provide fresh water, though they mostly lap droplets from misted leaves.
A varied insect-and-nectar diet prevents the deficiencies seen on insects alone.
Health
Healthy day geckos are vividly coloured, alert and quick, with clear eyes and a good appetite.
Their skin is fragile and tears easily, sometimes leaving permanent scars, so they should be handled as little as possible.
Calcium deposits, metabolic bone disease from poor UVB or supplementation, and retained shed are the main concerns.
Dull colour, lethargy, weight loss or a swollen jaw signals a problem and warrants a vet experienced with exotics.
Because they bask in strong light, correct UVB and a proper thermal gradient are central to preventing the most common illnesses.
Temperament
Day geckos are fast, alert and largely hands-off; they stress easily when handled and their delicate skin can be injured by restraint, so they are best enjoyed as an active display species.
They are diurnal, so unlike most geckos they are at their most visible during the day.
They are territorial and must be housed singly outside of supervised, carefully managed breeding.
Two adults, especially males, will fight fiercely.
A single gecko in a well-planted vivarium is the correct, welfare-friendly setup.
Small geckos dehydrate and lose condition quickly, and the tail is the fuel gauge.
Go now
Tremors, weak grip, or a jaw that will not close properlyGo now. Calcium and D3 deficiency.
Now
Today
Tail visibly thinning in a species that stores fat thereWeigh, then call with the trend. The fat store goes before the body condition does.
Today
Stuck shed around the toes or over the eyesRaise humidity, offer a damp hide, and call if it is not clear within a day. Constricting shed rings cost toes. This is the most common avoidable injury in geckos.
Today
Refusing food with weight lossCheck the cool-end and warm-end temperatures, then call. A gecko that cannot reach its preferred temperature cannot digest.
Today
This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it — and the time to find one is before you need one.
Can a madagascar giant day gecko eat that?
Geckos split into two diets that share almost nothing: insectivores like the leopard gecko, and the fruit-and-insect species like the crested gecko. Check which one you have.
Never (13)
AlcoholNo safe amount at any body weight on this site.
never
AvocadoPersin.
never
CaffeineCoffee, tea and energy drinks. Cardiac and neurological toxicity at tiny doses for an animal this size.
never
ChocolateTheobromine and caffeine. Small mammals and reptiles cannot clear either.
never
CitrusAcidic, and it blocks calcium absorption.
never
FirefliesLucibufagins. Fatal to geckos.
never
GarlicSame allium toxicity as onion, and more concentrated by weight.
never
Insects larger than the gap between the eyesA recognised cause of impaction and neurological injury in small geckos. Size the feeder to the animal, every time.
never
LeekAllium family. Same mechanism as onion and garlic.
never
OnionOrganosulphur compounds damage red blood cells. The whole allium family is out.
never
RhubarbVery high in soluble oxalate, high enough to cause acute kidney injury. The leaves are worse than the stalks.
never
Salty or seasoned human foodSalt, oil and seasoning. Crisps, chips, seasoned leftovers and processed meat are all out.
never
Wild-caught insectsPesticides and parasites.
never
Rare treats (1)
WaxwormsVery fatty and habit-forming. Useful to get weight on a thin animal. One or two, rarely.
rare treat
Occasional (4)
HornwormsHigh water content; useful for a dehydrated animal. One occasionally.
occasional
Mashed fruitFor crested and gargoyle geckos only, and only as a supplement to a complete diet. Never for a leopard gecko. A small amount, alongside the complete diet.
occasional
MealwormsHard chitin and a poor calcium ratio. A leopard gecko fed only mealworms is a leopard gecko heading for calcium problems. A few alongside better feeders.
occasional
SuperwormsFatty. One or two.
occasional
Everyday foods (4)
Black soldier fly larvaeHigh in calcium, and readily taken. Several per feed.
everyday food
Complete crested gecko diet powderFor crested, gargoyle and chahoua geckos only, mixed with water. A complete food and the simplest way to feed those species correctly. Fresh, every other day, for fruit-eating species.
everyday food
CricketsStandard feeder. Gut-load for 24 hours before offering. Sized to the eye gap.
everyday food
Dubia roachesThe best routine feeder for insectivorous geckos. Sized no wider than the space between the eyes.
everyday food
That food is not on our list. Check which kind of gecko you have first — the two diets barely overlap — then ask an exotics vet.
Dust feeders with calcium to the schedule in the species guide, and keep a small dish of plain calcium available for insectivorous species.
Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.
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