Breeding Tokay Geckos

Tokay geckos (Gekko gecko) are one of the more straightforward gecko species to breed in captivity. They do not require complex conditioning protocols or elaborate cycling routines. A healthy, compatible pair in well-maintained conditions will generally breed reliably. What requires more attention is managing the female’s health across multiple clutches and providing appropriate conditions for incubation. This guide covers the full process from pairing to hatchling care.

Breeding Age

Males should be at least one year old before breeding. Many experienced breeders prefer to wait until both sexes have reached their full physical development, typically around 18 months to two years for females in particular. The reason for waiting on females is straightforward: breeding is physically demanding and draws heavily on calcium and mineral reserves. A female that is not fully developed before her first clutch is more likely to experience complications and is harder to bring back into good condition afterward.

Overbreeding is one of the leading causes of death in captive female tokay geckos, second only to dehydration. A female needs adequate rest and nutritional recovery between clutches and between seasons. Any signs of weight loss, lethargy, or reduced appetite in a breeding female should be taken seriously and breeding activity paused.

Breeding Season

In the wild, tokay gecko breeding season typically runs from late October through early June. Captive animals may follow this cycle or breed year-round depending on conditions and individual animals. The male’s signature “to-kay” call (the vocalisation that gives the species its common name) becomes more frequent and insistent during the breeding season. Females signal receptivity by secreting fluids from their femoral pores.

Females will breed multiple times across the season, and males have been documented mating with multiple females. A female will typically lay two eggs approximately one month after mating and continue laying clutches roughly every 30 days, producing around 6 to 8 clutches over the course of the full breeding season.

Nest Setup and Egg Laying

Tokay geckos do not bury their eggs like many other reptile species. A gravid female ready to lay will show an increased appetite followed by gradual weight loss, and may display digging behaviour even though the eggs will not go into the substrate. Watch for these signs as they indicate laying is imminent.

Eggs are laid and adhered to a vertical solid surface, typically between two flat surfaces such as slate tiles, sections of bark, or cork flats. The female presses the eggs firmly against the surface about an inch or two apart. Both parents then guard the eggs: tokay geckos are unusual among geckos in that both male and female actively protect the clutch, occupying spaces above and below the nest site. The nesting space should be approximately 18 to 24 inches wide to give both adults and the egg cluster adequate room.

Provide at least one suitable nesting site from the start of the breeding season. If the nesting area is disturbed or removed, the female is likely to stop laying for the remainder of the season.

Incubation

Tokay gecko eggs are leathery and pliable rather than hard-shelled, which allows them to expand as the embryo develops. For more on what gecko eggs look like and how to assess fertility, see our gecko egg guide.

One of the most notable features of tokay gecko reproduction is temperature-dependent sex determination. Research has shown that incubation temperature significantly affects the sex ratio of hatchlings: studies indicate that a steady 77°F produces predominantly female hatchlings, while temperatures around 86°F produce predominantly males. Temperatures outside this range in either direction tend to result in developmental failure. Monitor temperature closely throughout the incubation period.

Eggs can be left in the breeding enclosure with the parents guarding them, or carefully moved to a dedicated incubator. If using an incubator, prepare it and introduce it to the enclosure at the start of the breeding season rather than after eggs have been laid. Disrupting an established nesting site after the female has laid can cause her to abandon laying for the season.

A simple DIY incubator can be made using a plastic container with damp substrate (coconut fibre, peat moss, or moist paper towels) and ventilation holes in the lid. The substrate should be kept damp but not wet. The shells need to stay pliable and must not dry out, but sitting in water will cause the eggs to fail. Incubation typically takes 90 to 120 days depending on temperature.

Unfertilised Eggs

Female tokay geckos can lay eggs without mating. These unfertilised eggs will not develop and will eventually collapse and moulder. Remove them promptly from the incubation area to prevent mould spreading to any fertile eggs nearby.

Contrary to a common assumption, tokay parents do not typically eat their own fertile eggs. They may consume unfertilised eggs as a source of nutrition. However, a second unrelated female housed with the pair may eat eggs from the first female, and a male that detects eggs from a previous breeding with a different male may destroy or consume them. This is a compelling reason not to house multiple unrelated tokays together during the breeding season.

Hatchling Care

Eggs hatch after 90 to 120 days. Hatchlings emerge at around 2 to 3 inches in length. The first behaviour after hatching is a shed: the hatchling will consume its shed skin, which is rich in minerals and provides early nutrition.

After the first shed, hatchlings can be offered small prey items: small crickets, fruit flies, and other insects appropriately sized to the gap between the hatchling’s eyes. Both parents will care for the hatchlings for approximately the first 60 days, after which the young geckos become self-sufficient.

Move juveniles to a separate enclosure by around 60 days to prevent the adult male from becoming aggressive toward them as they grow. Hatchlings can be housed together initially but should be separated into individual enclosures before they reach six months, as tokay geckos become increasingly territorial with age.

Female Health and Recovery

This section warrants its own coverage because it is where captive tokay breeding most commonly goes wrong. A female producing 6 to 8 clutches of two eggs per season is undergoing significant physiological stress. Calcium depletion, weight loss, and exhaustion are real risks.

Throughout the breeding season, increase the female’s feeding frequency and ensure calcium supplementation at every meal. A dish of calcium powder left in the enclosure for self-supplementation is a useful addition. Monitor her weight and body condition regularly. A female losing condition rapidly needs to be separated from the male and given a full recovery period before the next season.

Between breeding seasons, allow the female at least two to three months of complete rest with no male contact, increased feeding, and consistent supplementation before considering pairing again.

Tokay Gecko Overview

For anyone new to the species, a brief overview of tokay gecko biology and care requirements relevant to breeding.

Origin and Natural Habitat

Tokay geckos are native to northeast India and the Indo-Australian Archipelago, where they inhabit tropical and deciduous forests. They are an arboreal species, spending most of their time climbing trees, cliffs, and in the wild increasingly, man-made structures. They are one of the most adaptable gecko species and have established feral populations across much of Southeast Asia and parts of the Pacific.

Size and Appearance

Tokay geckos are one of the largest gecko species in the world. Adult males reach 13 to 16 inches in length; females are typically smaller at 8 to 12 inches. Both sexes weigh between 140 and 200 grams. Males are more brightly coloured, with vivid blue-grey bodies covered in orange-red spots, and have broader, more angular heads than females. The pronounced V-shaped row of femoral pores between the rear legs is a reliable secondary sex marker in adults.

Their eyes are large with vertical slit pupils, well-adapted for nocturnal hunting. Unlike leopard geckos, tokay geckos have adhesive toe pads and are capable climbers on smooth vertical surfaces including glass. For a broader species comparison, see our guide to gecko species.

Temperament

Tokay geckos have a well-earned reputation for aggression. They bite readily when threatened, restrained, or surprised, and their jaws are strong enough to draw blood. This is not a species recommended for beginner keepers or households with young children. Some individuals do become calmer with consistent, patient handling over time, but this is not guaranteed and should not be the expectation when acquiring a tokay gecko.

Their territorial nature is directly relevant to breeding: never house two males together, monitor male and female pairs closely during the breeding season, and remove any aggressor immediately if biting or sustained aggression occurs. Tokay geckos will fight seriously and can injure each other.

Enclosure and Conditions

A 30-gallon vertical enclosure is appropriate for an adult. The enclosure should include climbing branches, dense foliage (live or artificial), multiple hiding spots, and a moisture-retaining substrate such as coconut fibre, cypress mulch, or orchid bark. Temperatures should range from 80 to 87°F with a basking area reaching 90 to 95°F. Humidity should be maintained at 60 to 80% through daily misting.

Tokay geckos are nocturnal and do not require high-output UVB lighting, though low-level UV exposure is beneficial. As noted in research on reptile circadian function, artificial lighting can disrupt circadian rhythms in nocturnal species, so any lighting should be kept to low intensity and on a natural day/night schedule.

Diet and Lifespan

Tokay geckos eat insects primarily: crickets, roaches, mealworms, waxworms, and silkworms all accepted. Larger adults may occasionally take pinky mice, sized to no larger than the space between the gecko’s eyes. Gut-load all feeders before offering and dust with calcium and a multivitamin supplement regularly. With proper care, tokay geckos live around 10 years in captivity. For full lifespan context across gecko species, see our gecko lifespan guide.