I don't know what do it or what it is:
What do I do? I put my lizard in a plastic container for now.
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I don't know what do it or what it is:
What do I do? I put my lizard in a plastic container for now.
image here

An aracnid ? Bird mite???
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PHEve / Eve
It looks like a mite to me too.
I only saw one. I took everything out and looked and didn't see any more. I have my collared in a separate container now. I washed out the tank with bleach/water solution and cleaned/soaked all the rocks and branch with the same solution. I baked the branch also at 360 for about 20 minutes. I bought Provent-A-Mite and had it expedited so I can spray everything over before I put my lizard back in. Anything else I should do? I checked her and didn't see any on her either.
i wouldnt spray your enclosure with prevent a mite it can leave a residue that can be ingested by your feeders. i would treat the container thats only a temp home and let it air out and leave the collard in it for half an hour and you should be ok. i do this with some geckos when they have red mites and it seems to work. these mites tend to hide in the folds of the skin so a good soaking and treatment with the mite spray should take care of your problems. with this being said your little critter doesnt look like the typical red mite so i am assuming its an aphid and they are usually harmless but better to be safe.
good look
I think it just has six legs and two antennas. I think it looks like some kind of beetle. I've never seen a mite that looks like that on a bird. Bird mites look like giant flat flies.
I doubt that it is harmful. Collareds probably encounter bugs like that all the time, and probably eat them. 
Here is another pic and larger. The white thing it's on is a regular paper towel, hopefully this gives you all a better idea of how small it was.

Pandg is right, It's a predatory mite... or maybe a spider mite. The predatory mite preys on other mites like the spider mite while the spider mite feeds on vegetation. I wouldn't worry about them unless you have real plants in your enclosure... Spider mites could kill your plants.
I think that is a predatory mite. A mite eating mite. They move about fast in search of food.
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