Many new leopard gecko owners will wonder why their gecko seems to be hiding from them. There are a couple of reasons for this, but the biggest reason is that leopard geckos are nocturnal and will usually stay in one of their hides (you should have three leopard gecko hides Learn what type of hides you need for leopard geckos.) all day until night.
The only time you should be concerned is if your leopard gecko has not left their hide for 24 or more hours. This can indicate that your tank may not be the right temperature or that the gecko is feeling ill and you should make sure they are not displaying any type of abnormal behavior.
When a leopard gecko is surprised or startled they will sometimes make a high pitched squealing sound. They do this to startle you long enough that they have time to escape. This is most common with younger leopard geckos but can happen occasionally with adult geckos too. Many owners claim that squirting a leopard gecko with a misting bottle will sometimes make them squeal.
Leopard geckos will bite the tails of other leopard geckos when mating or to show dominance. If you place two males or two females in the same tank and they begin biting each other tails and using defensive tail shakes, then you should separate them because they are being too aggressive. Generally, you should never put two males in the same tank, but sometimes you can accidentally get a male gecko thinking it is a female gecko.
There are a few different tail wiggles/shakes that leopard geckos will use:
Slow Tail Shakes – When a leopard gecko shakes their tail slowly, they are telling other geckos that they are there and are aware of their presence. Normally the gecko will lower themselves to the ground and will shake their tail slowly. Sometimes this can also be a sign that the leopard gecko is excited.
Fast Tail Shakes – Male leopard geckos will usually shake their tails rapid if they are put in the same presence as female leopard geckos. This tells the females that there is now a male in the area and that he is aware of the females being there.
Defensive Tail Shakes – Leopard geckos will drop their tails if they are ever threatened so the prey will go after their tail instead of the gecko. As you can imagine, leopard geckos will shake their tail to divert attention whenever they feel threatened. Generally the gecko will lower their body to the ground and will point their tail up slowly wiggling it. They will often have their head arched up staring at the threat.
Leopard geckos may also use a defensive tail shake if they are unsure about another gecko. If your gecko is making this gesture when you are near him/her, do not try to pick them up because they may try to bite you. Instead you should let the gecko know that you are not a threat. You can try standing there until the gecko relaxes or you can slowly place your hand into the tank, away from the gecko so he/she can investigate it or hide. Eventually your gecko will become used to your presence.
Excitement Shakes – You will usually see this type of tale shake when the gecko is hunting bugs/eating. Usually it is more common in younger geckos, but adult geckos will do it every now and then. When this occurs the gecko will raise their tail and slowly move it from side to side, and then when they are about to attack the insect they will quickly shake their tail before attacking.
Leopard geckos have a Jacobson's gland, which allows them to sense objects and their environment by flicking their tongue (much like a snake does). It is not uncommon to see your leopard gecko flick his/her tongue to familiarize themselves with new items in the tank.