Does this look like the lizard you have spotted in the house?
What State do you live in?
Does it look more like this Lizard?
Coloration may vary from what you had seen, but trying to see what type of lizard we are dealing with. can you tell me what State you are in?
I suspect you are seeing a Five Lined Skink which are common in VA. This is a link about them: http://www.fcps.edu/islandcreekes/ecology/five-lined_skink.htm
If scared they can give off an odor. The droppings are a small piece of black and a little white which is the urates (hardened urine).
Skinks will get in any cracks or crevices they can. They eat insects as a diet. There is not way to keep them out other than sealing all cracks and area they can get in to the house.
The best thing you can do is get some stick traps to catch any that may get in and seal all areas of the home where they can enter.
These are what the sticky traps look like: http://www.bugspray.com/catalog/products/page99.html You can usually find sticky traps at Lowes or Home Depot.
These lizards are harmless, but just bothersome if they come inside.
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It sounds like the skink is full grown. They usually get to 7"-8" The best thing you could do is to try the sticky traps. They are very effective. Unfortunately with the heat this year even the wildlife is trying to find a place that is cooler to hide.
You can order the sticky traps here. The small is what you need: http://www.bugsaway.com/catalog/glueboards-c-28.html
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Okay about the email....One final question seeing my dog just go running thru reminded me of? Are these lizards dangerous to dogs, she was the first to notice it and I'm afraid she's going to catch it and kill it. I read something about blue-tail skinks will drop their tails and it can cause PVD in cats and dogs. Is there any real worry with that?
The lizards are not toxic, but will give off a bad taste and cause salivating and some nausea and vomiting. In some cases it can cause Vestibular issues, but usually will resolve itself quickly. Most lizards use the tail drop as a defense mechanisim to be able to get away from animals. Joan
Hope that you can resolve catching the Skink. Joan