Crested Gecko Sexing Guide Tool

What is the Crested Gecko Sexing Guide Tool?

The Crested Gecko Sexing Guide Tool helps estimate the sex of crested geckos using visual probing or physical cues. Knowing what you're working with shapes everything from diet and housing to expected size and temperament. That is useful for new owners and shelters alike.

Crested geckos generally live 15-20 years when they are well looked after. Diet-wise they are a frugivore, which shapes almost every feeding decision you make. Crested geckos are arboreal and need a tall planted enclosure rather than a wide one, kept at room temperature between 22-26C. They thrive on prepared powdered diets and cannot tolerate heat above 28C. Keep an eye out for metabolic bone disease, floppy tail syndrome, heat stress above 28C. These are the conditions crested geckos are most commonly seen for.

How does the Crested Gecko Sexing Guide Tool work?

The result is based on matching the traits you describe against commonly documented characteristics for crested geckos, not genetic testing. Use it to know roughly where you stand and what to ask about, not to rule anything in or out on its own.

Factors that matter

• Physical traits such as size: coloring and markings
• Behavioral traits: which can be just as informative as appearance for some questions
• Age: since juvenile traits can differ noticeably from adult ones
• Photo or description quality: the more specific your input, the more useful the match

How do you use the Crested Gecko Sexing Guide Tool?

1. Pick your hemipenal bulges at the base of the tail (Two clear bulges, Tail base slim and tapering, Cannot tell)
2. Pick your femoral or preanal pores on the underside of the thighs (Large and waxy, Small or absent, Not applicable or cannot see)
3. Pick your size relative to others of the same age (Noticeably larger and bulkier, Smaller and slimmer, About the same)
4. Pick your head and jowls (Broad with heavy jowls, Narrow and smooth, Not distinctive)
5. Press Calculate, then read the result alongside the sources listed below

Worth doing: jot down the date and the result each time. A single number tells you little, but a trend across a few months tells you a lot about your crested gecko.

For related questions, see the other identification tools or browse every crested gecko tool.

Before you rely on this

Averages hide a lot of variation. The figure here reflects what is typical for crested geckos, but your crested gecko may sit well outside it for perfectly ordinary reasons. Use the result to spot changes over time in your own animal rather than to compare it against other people's pets.