Blue Tongue Skink Lay Eggs

Did you know that blue tongue skinks lay eggs? These fascinating reptiles, native to Australia and New Guinea, possess a distinct characteristic that sets them apart from other reptiles – a vibrant blue tongue! But that’s not all, these skinks have another unique feature – they lay eggs instead of giving birth to live young. In this article, we will explore the fascinating world of blue tongue skinks and discover more about their fascinating egg-laying behavior. So, get ready to unravel the mystery behind these incredible creatures!

Blue Tongue Skink Lay Eggs

Life Cycle of Blue Tongue Skink

Blue tongue skinks, commonly known as blue-tongued lizards, are fascinating creatures with a unique life cycle. From the egg laying process to hatching and gender determination, every stage of their life is intriguing. In this article, we will explore the various stages of the blue tongue skink’s life cycle, offering an in-depth understanding of their reproduction and development.

Egg Laying Process

The egg laying process begins with a series of events that are crucial for successful reproduction in blue tongue skinks.


To initiate the egg laying process, a male blue tongue skink must successfully court a female and engage in mating behavior. This involves various displays of dominance, courtship rituals, and the eventual transfer of sperm from the male to the female.

Gestation Period

Once the mating has taken place, the female blue tongue skink undergoes a gestation period that typically lasts around four to six weeks. During this time, the fertilized eggs develop within her body, preparing for later oviposition.

Preparation of Nest

As the end of the gestation period approaches, the female blue tongue skink begins preparing a suitable nest. This involves finding a secluded and safe spot in her habitat, usually in loose soil or leaf litter. The female will then dig a shallow hole to lay her eggs.

Laying Eggs

After digging the nest, the female carefully lays her eggs one by one. Blue tongue skinks typically lay a clutch of 6 to 25 eggs, although the exact number may vary depending on factors such as the female’s age and health. Once all the eggs are laid, the female covers them with the soil or leaf litter to protect them from predators and maintain an optimal incubation environment.

Egg Development

Once the eggs are laid, the development process begins, which determines whether they will hatch successfully or not.

Viable Eggs

Viable eggs are those that have been fertilized and possess the potential to develop into healthy hatchlings. These eggs will show signs of embryonic growth within a few weeks after being laid.

Infertile Eggs

On the other hand, infertile eggs do not contain viable embryos. These eggs will not show any signs of development, and will typically turn yellow or disintegrate over time.

Egg Structure

Blue tongue skink eggs have a tough, leathery shell that allows for gas exchange while protecting the developing embryos from external harm. The eggs are oblong in shape and vary in size depending on the specific species of blue tongue skink.

Incubation Period

After the eggs are laid, they enter a crucial stage called the incubation period, where the environmental conditions play a significant role in their development.

Optimal Temperature

Maintaining the correct temperature during incubation is crucial for the successful development of blue tongue skink eggs. The ideal temperature range falls between 86°F (30°C) and 90°F (32°C). Any temperature fluctuations beyond this range can significantly impact the viability and gender of the hatchlings.

Incubation Methods

There are various methods of incubating blue tongue skink eggs, with each method having its own advantages and considerations. Some breeders prefer using artificial incubators, while others opt for natural incubation in a separate enclosure. Whichever method is chosen, regular monitoring of temperature and humidity is essential to ensure optimal conditions for the eggs.


The hatching process marks the culmination of the blue tongue skink’s development inside the egg.

Eggs Pipping

Approximately 60 to 90 days after being laid, the blue tongue skink eggs will start to “pip.” Pipping refers to the process where the hatchlings start to make small cracks or holes in the eggshell using their egg tooth.

Assisting Hatching Process

During the hatching process, it is crucial not to intervene or assist the hatchlings unless it is absolutely necessary. The process of hatching is strenuous and essential for strengthening the hatchlings, and interfering may lead to complications or developmental issues.

Time to Hatch

Once the pipping process begins, it can take anywhere from a few hours to several days for the hatchlings to fully emerge from their eggs. The hatching time can vary depending on factors such as temperature, humidity, and genetics.

Appearance of Hatchlings

When the hatchlings finally emerge from their eggs, they are miniature versions of the adult blue tongue skinks. They possess the iconic blue tongue and distinct markings, although these may be less pronounced at such an early stage. The hatchlings are fully functional and independent, ready to embark on their journey in the world.

Blue Tongue Skink Lay Eggs

Gender Determination

The gender of blue tongue skinks is determined through a fascinating process called temperature-dependent sex determination (TSD).

Temperature-dependent Sex Determination

In blue tongue skinks, the temperature at which the eggs are incubated plays a significant role in determining the gender of the hatchlings. Higher incubation temperatures typically result in the production of females, while lower temperatures tend to yield males. This unique biological phenomenon adds to the allure of these remarkable reptiles.

Other Factors Influencing Gender

While temperature is the primary factor influencing gender in blue tongue skinks, other genetic and environmental factors may play a supplementary role. However, their exact influence and interactions are still being studied by researchers, making the gender determination process a topic of ongoing scientific investigation.

Environmental Factors Affecting Egg Laying

Blue tongue skinks are influenced by various environmental factors during the egg laying process.

Seasonal Variation

The breeding and egg-laying behavior of blue tongue skinks often exhibit seasonal patterns. These reptiles are more likely to breed and lay eggs during certain times of the year, influenced by factors such as temperature, daylight length, and availability of food resources. Observing and understanding these seasonal variations can greatly assist in successfully breeding blue tongue skinks.

Territorial Behavior

Blue tongue skinks are known for their territorial behavior, which can impact their egg-laying behavior. Dominant males may establish territories that attract females for mating while ensuring the safety of the nest site. Understanding and accommodating for this behavior is crucial for providing suitable conditions for egg laying.

Habitat Conditions

The overall habitat conditions, including temperature, humidity, and substrate composition, can greatly influence a female blue tongue skink’s decision to lay eggs. Simulating the natural habitat conditions during egg laying can significantly increase the chances of successful reproduction.

Blue Tongue Skink Lay Eggs

Care for Egg-Laying Blue Tongue Skink

Caring for a female blue tongue skink during the egg-laying process requires careful monitoring and provision of optimal conditions for successful reproduction.

Observation and Monitoring

Regular observation of the female’s behavior can provide vital clues about her readiness to lay eggs. Signs such as restlessness, digging behavior, and loss of appetite may indicate that the female is preparing to lay eggs. Monitoring her closely allows for timely intervention and adjustment of environmental conditions if necessary.

Maintaining Proper Temperature

Maintaining a consistent and appropriate temperature range within the enclosure is crucial throughout the egg-laying process. Providing a thermal gradient that allows the female to choose her preferred temperature helps create a suitable environment for egg development.

Providing Suitable Nest

Creating a suitable nesting area for the female is essential for successful egg laying. This involves providing a private and secure spot with appropriate substrate where the female can dig and lay her eggs. Offering choices, such as providing multiple nesting boxes with different substrate options, allows the female to select her preferred spot.

Incubation Techniques

If the goal is to incubate the eggs artificially, careful consideration must be given to the incubation technique. Using a reliable incubator with adjustable temperature and humidity controls is essential for mimicking the necessary conditions for egg development. Regular monitoring and adjustment may be required throughout the incubation period.

Post-Hatching Care

Once the eggs have hatched, it is crucial to provide suitable post-hatching care for the newborn blue tongue skinks. This includes providing appropriate enclosures, maintaining proper temperature and humidity levels, and offering a balanced diet to ensure their healthy growth and development.

Caring for Hatchlings

Proper care for hatchlings is essential to ensure their well-being and transition into adulthood in captivity.

Separating Hatchlings

Hatchlings should be separated from each other to prevent aggression and cannibalism. Each hatchling should have its own enclosure to minimize stress and ensure proper feeding opportunities.

Providing Proper Enclosure

The enclosure for hatchlings should be appropriately sized, offering enough space for movement and exploration. A secure and well-ventilated enclosure with suitable substrate and hiding spots helps create a stress-free environment for the hatchlings’ growth.

Feeding and Hydration

Proper nutrition is crucial for the healthy growth and development of blue tongue skink hatchlings. Providing a varied diet that includes appropriate insects, fruits, and vegetables ensures they receive the necessary nutrients. Additionally, access to clean water for hydration is essential to keep the hatchlings healthy.

Blue Tongue Skink Lay Eggs

Breeder Tips for Successful Egg Laying

For breeders aiming to successfully breed blue tongue skinks, certain tips can significantly increase the chances of a successful egg-laying process.

Creating Optimal Breeding Conditions

Creating an optimal breeding environment involves providing suitable enclosure conditions, such as temperature gradients, appropriate substrates, and hiding spots. Additionally, ensuring a stress-free environment and minimizing disturbances can contribute to the success of the breeding process.

Providing Adequate Nutrition

Offering a well-balanced and nutritious diet to breeding blue tongue skinks is crucial for their reproductive health. A diet rich in calcium, vitamins, and minerals helps promote healthy egg production and development.

Ensuring Healthy Breeding Pair

Maintaining optimal health conditions for the breeding pair is essential for successful egg laying. Regular check-ups and testing for parasites or diseases can help ensure the overall well-being of the blue tongue skinks.

Consulting Experts or Breeders

Seeking advice and guidance from experienced blue tongue skink breeders or experts can provide valuable insights into the breeding process. Learning from those who have successfully bred blue tongue skinks can help address specific challenges and increase the chances of a positive outcome.

In conclusion, the life cycle of blue tongue skinks is a captivating journey that involves diverse stages, from egg laying to hatching and gender determination. Understanding and appreciating each phase allows us to appreciate the complex yet beautiful process these reptiles go through. By providing optimal conditions and diligent care, breeders and enthusiasts can contribute to the conservation and enjoyment of these remarkable creatures.