If laid in the cage substrate or cage floor, they can dry out pretty quick, fertile or otherwise. Crested gecko eggs do need a fair amount of humidity to incubate fully. Its always recommended to have an egg laying box in the cage with damp sand/soil mix or even damp coconut husk fiber (ie 'bed a beast' is one brand name for it..coir is the technical name..basically it comes in a brick you add water to, and the brick expands more than ten times in size...so its light and fluffy.) Eggs should be transferred into a deli dish with a vermiculite/water mixed in equal parts by weight (ie 50g of vermiculate to 50g of water) Crested gecko eggs can be incubated at room temperature...anywhere between 70-78F. I typically incubate between 73-75F which is pretty much my room temperature.

If you find the eggs already badly dried out and smelly, they are dead eggs, whether they were fertile before or not. The females will lay about once every 3-4 months and you can notice the eggs forming in them as whitish ovals through their underbellies. They don't get hugely fat when gravid but there is a noticeable increase in girth when they are close to time to lay eggs. It would be a good idea now, to check the cage completely for any other eggs and remove them. Then check weekly till you find the next fresh batch then you can check about 2-3 weeks later for more. Its far easier to find eggs if you use a papertowel substrate and provide an egg laying bin. If you use soil/sand or coir as the substrate, its much harder as the geckos may not use a egg laying bin, unless it is perfect and the substrate elsewhere in the cage isn't.
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PHLdyPayne

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