Sorry the photo is terrible, but I wasn't too sure what to check for. Her legs are pretty blue and her body is more of a grey color. If photos of specific body parts are required let me know where :)

Is she making burrows? Like a big "pet hole"?

If you open the cage and she leaps at your face, fangs extended, she is probably a cobalt blue. ;-)

@Mel4short: no she is not burrowing at all, but that might be my fault....I only had enough coco fibre to make about 2" in her enclosure (more is on the way)....I did give her a piece of bamboo that she fits in just right and she has been using that/webbing it up.  

@Mason: yep, thats pretty much her :)

It looks like it could be a cobalt blue. I cant remember which adult is blue and which one is kindof unattractive, male or female wise.

They will hide in whatever is sufficient if you dont have enough stuff for them to burrow in, but they much prefer to be underground.

Watch your face and finger tips. I dont miss my blue at all.

My boyfiend says (I don't know squat about spiders): Female cobalts exhibit a very high blue. Mature males are basically brown. More commonly, Vietnamese bird spiders are mistakingly shipped as cobalt blues. With a better photo, I can tell you exactly what it is. Also, most adult Ts don't burrow unless they have a cave or something to burrow into. So it's generally a baby habit. Adults usually take over vacant burrows.

Cobalts do tend to burrow..even adults. I'd put about 4-5 inches of eco earth in her habitat. And yeah, look out!!! 

Hi, cant see much in that pic... Anyways female Cobalts are the nice ones with bright blue legs, the carapace is light gray while the abdomen is a grayish brown. The individual in the pic, to me looks to be a male (they also have purplish-blue faded legs) but is possible that the lightings messed up or its a female near a molt. It looks like a Haplo for sure (there are a few diff. species) and most likely a Cobalt as Im pretty sure its the only haplo with any blue on it.

 Its very important that you get at LEAST a good 4 inches of substrate in there. Keep in mind that once you do this you'll have a pet hole :P . This is a pretty aggro T--seen them fall on their backs with their fangs dripping venom, but once they construct a burrow I doubt you two will ever come in contact with him/her :P.

As far as age..who knows, some people feed ts like crazy and they reach max size in only a few years, while some feed one food item once every week or two. If your Haplo is 5 inches then its most likely over two years. If you got it at the pet store its more than likely a female of a few years (most people catch the females to sell to pet stores, almost all WC cobalts Ive seen are female--probably due to the fact that the males look nothing like the females?) but the only way to sex it for sure is if you supply us with a ventral shot and a molt pic...as Ive seen pretty males before.

It does not look like a H. lividum but it is hard to tell from that picture. Give it some deeper substrate, and a place to climb. If it is a lividum it will burrow, if it an Asian tarantula it will more than likely climb.

Female lividum's are well Colbalt blue, males are kind of sickly green/yellow there is no mistaking the two. Most Asian's are sexually dimorphic as well, so I would GUESS this is a female.

I have put a MUCH better updated picture on her page. Is this sufficient for IDing her? (I have only ever seen her come out of her hide between 12-4am and I disturbed her way more than I wanted to in order to take that photo so I hope its fine :)

100% H Liv Female.

awesome thank you very much....any way to tell age or what molt she is on? 

Not really, they molt baised on feeding and temp. She is more than likely more than 2 years old and less than 20. Tarantula's don't have a set number of molts that we know of so there is no way to know about the instar (molt) either.