Leopard Gecko Gaping

Question
Hi Pam,
Your page came up in a google search for leopard gecko gaping, and after browsing through the many postings, I can't seem to find your answer.
I only handle my gecko for short periods of time, a few times a week, as I've read that they don't necessarily like to be over held.
On a few occasions, I've noticed that while she's on my hand, she'll open her mouth and keep it open for a few seconds (what I assume to be "gaping").  
What does this mean?  She seems to be healthy in all other aspects.  Should I be concerned, or is this normal behavior?
Thank you,
Kim

Answer
Hi Kim,

 Geckos, as well as many other species gape for different reasons.  In your case, since you have just taken her out and it's for a few seconds, is a defensive posture, as she is not sure if you are the predator. Moderate handling is fine, but your hand, in her environment frequently, and always with something in it that is really good, like a juicy insect, or a dollop of babyfood, will get her used to it being there and a good thing.
 Extended gaping in the cage is usually her way of releasing excess heat.  And it's your signal to check her temperatures in her habitat.
 Gaping constantly, accompanied by lethargy, and using accessory muscles in the chest and back, is a sign of respiratory problems and should be attended to by a vet as soon as possible.