Brooke Martin
Leopard gecko egg candling is a method used to determine whether a gecko egg is fertile. This involves shining a light on the egg to observe its colour. A fertile egg will typically have a pink or reddish hue, indicating the presence of growing life inside. On the other hand, infertile eggs often appear pale yellow without any red colouring. While candling is a useful technique, it is recommended to handle the eggs as little as possible to prevent accidental damage and maintain stable humidity and temperature conditions.
| Characteristics | Values |
|---|---|
| How to candle leopard gecko eggs | Shine a light on the eggs to see if they give off a pink/reddish colour, indicating fertility |
| Incubation temperature | Between 85 and 90 degrees Fahrenheit |
| Incubation duration | Anywhere from 40 to 100 days |
| Handling of eggs | Handle with care and minimal disturbance to avoid accidental damage and maintain humidity and temperature |
| Identification of fertile eggs | Firm texture, oval shape, and may show a bullseye shape ring of veins near the top |
| Identification of infertile eggs | Soft, watery texture, possibly misshapen or shrivelled, and may appear pale yellow |
| Incubation container | Commercial incubator or homemade using a small plastic container |
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What You'll Learn
How to candle leopard gecko eggs
Leopard gecko eggs should be candled after incubating for at least a week. This is done to check if the eggs are fertile. It is recommended to candle the eggs as early as possible because the embryo will eventually reach full size, making it difficult to see any detail in the egg.
To candle leopard gecko eggs, shine a light on the eggs in a dark room to observe their colour. The light source should not heat the eggs, so an LED headlamp is preferred. The eggs can be candled without removing them from their incubation container.
A fertile egg will give off a pink or reddish colour, indicating that there is something growing inside. During development, a network of veins can be observed spreading throughout the egg, and a bullseye shape ring of veins can be seen near the top.
Infertile eggs will likely look pale yellow without any red colour. However, infertile eggs can still be incubated for months, and some eggs take a long time to hatch, so it is recommended to continue incubating until the egg grows mould, deflates, or smells bad.
It is important to handle the eggs as little as possible to avoid accidental damage and to prevent changes in humidity and temperature.
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What colour should fertile eggs be?
To check if a leopard gecko egg is fertile, shine a light on it to see if it gives off a pink or reddish colour. This indicates that there is something growing inside. You may also be able to see a bullseye shape ring of veins near the top of the egg. Infertile eggs will likely look pale yellow with no red colour. However, it is always best to incubate until the egg grows mould, deflates, or smells bad.
Candling is a method to check for a fertile egg. To candle leopard gecko eggs, shine a light into one end of the egg in a dark room. The egg can be kept in its incubation container to avoid disrupting the humidity and temperature.
After a week, good eggs will feel like firm marshmallows on the outside and will feel full of fluid if you squeeze them gently. Bad eggs, on the other hand, will feel papery thin and dent in like they are only half full of liquid.
During development, the network of veins will spread throughout the egg, and the egg will continue to glow pink. As the embryo reaches full size, it becomes more difficult to see any detail in the egg. Sometimes, only a dark area and a big airspace near the top of the egg are visible. If the incubation conditions are correct, fertile eggs will stay white and will grow in size during incubation.
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How to handle the eggs
To handle leopard gecko eggs properly, you should first prepare an incubator before the gecko lays its eggs. You can purchase an incubator or make your own using a small plastic container. The temperature in the incubator should be between 85 and 90 degrees Fahrenheit.
Once the female gecko has laid its eggs, carefully remove them from the tank to transfer them to the incubator. Use a spoon to pick up each egg and place it in the incubator in the same position it was laid in. This is because the embryo will die if the egg is flipped over. Be very gentle, as leopard gecko eggs are delicate and can be damaged easily.
After placing the eggs in the incubator, avoid touching or moving them as much as possible. Each time the eggs are handled, the humidity and temperature drop, which can be detrimental to the embryos. If you want to candle the eggs to check for fertility, you can do so without removing them from the incubator.
If the eggs start to hatch, you do not need to intervene. Leave the newborns alone for at least 12 hours, as they will be very frightened of people at first. After this period, carefully transfer them to their new enclosure.
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What to do if the eggs are infertile
Leopard gecko eggs should be candled to determine their fertility. This is done by shining a light on the eggs—either by keeping them in their incubation container in a dark room and using a torch, or by using a headlamp. Fertile eggs will give off a pink or reddish colour, indicating that there is something growing inside. Infertile eggs, on the other hand, will likely look pale yellow without any red colour.
If the eggs are infertile, there are a few things you can do:
- Infertile eggs can be discarded, especially if there is limited room in the incubator. However, it is recommended to keep the eggs if possible, as sometimes an egg that initially looks unhealthy may become healthier over time and eventually hatch.
- It is important to provide proper supplementation and veterinary care to the female gecko if necessary. Infertile eggs can take a significant toll on the female gecko's body, so some weight loss is normal. Ensure the gecko has adequate calcium and multivitamins, and provide a lay box or dig box in their enclosure.
- Incorrect incubation conditions can cause problems, leading to dents or mould on the eggs. While dents can be corrected by adding damp moss on top of the egg, and mould can be gently wiped off, infertile eggs cannot be saved.
- If the female gecko has not been with a male in the past year, the eggs are likely infertile and can be thrown out.
- Freezing the eggs is another option if you are unsure what to do with them.
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How to create the right environment for hatching
To create the ideal environment for hatching leopard gecko eggs, there are several factors to consider. Firstly, it is essential to choose the right equipment for successful incubation. Many breeders opt for specialised incubators designed for reptile eggs, which often feature built-in temperature and humidity controls. These controls are crucial in maintaining consistent conditions, as temperature changes can impact the growth rate and overall development time of the embryos. In some reptiles, temperature even determines the hatchling's sex, highlighting the importance of proper incubation.
The ideal incubation period for leopard gecko eggs typically lasts around 45 to 60 days. During this time, it is recommended to open the incubator lid about once a week to allow for air circulation and temperature regulation. It is important to minimise handling the eggs, as each disturbance can lead to drops in humidity and temperature. Candling, a method to check for fertile eggs by shining a light on them, can often be done without removing the eggs from their incubation container.
The right balance of temperature and humidity is critical for nurturing the embryos and ensuring healthy hatchlings. Humidity levels specifically impact the embryo's nutrient absorption, with too dry conditions leading to dehydration and overly wet conditions fostering mould growth. To prevent mould, you can gently wipe it off with a cotton bud. Additionally, dents in the eggs caused by low humidity can be corrected by placing damp moss on top of them.
To create a suitable hatching environment, use a mix of coconut fibre and perlite as a substrate for good moisture retention and drainage. It is also recommended to have a nursery or tank setup ready before the eggs hatch to ensure a smooth transition for the newborn leopard geckos. This new habitat should mimic their natural environment and include essential elements like small tubes and structures.
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Frequently asked questions
To candle leopard gecko eggs, shine a light on the eggs to see if they give off a pink/reddish colour, indicating fertility. You can use a candle, torch, or headlamp. It is best to do this without removing the eggs from their incubation container, to avoid disrupting the temperature and humidity.
It is normally possible to tell immediately if leopard gecko eggs are fertile by candling them. However, you may choose to wait a week after the eggs are laid to allow them to develop. After this, you can leave them alone unless you suspect something is wrong.
A healthy leopard gecko egg is usually hard upon hatching and gets harder over time. It should be oval-shaped and white. Infertile eggs are often soft, with a texture similar to a water balloon, and may be misshapen or shrivelled.
