I'd like help identifying the species of animal in these two photos. There's some dust(or dust-like substance) with something alive inside of it (possibly a larva or I don't really know what to call it). This appeared in a couple of hours in the wall. Please, try to even just guess what this could be (I can't think of anything!). Very odd... I don't even know what tags I hsould use for this!

Thanks in advance enter image description here new photo enter image description here

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    $\begingroup$ How big is it? Where do you live? It's very hard to see any animal in the photos, but for example Case Bearing Moth larvae use fibers to make the "case" that it lives in. Or maybe a carpet beetle larva that happened to hide in this dust. $\endgroup$ – picapica Feb 26 '16 at 19:53
  • $\begingroup$ it's a bedroom. there's a dust around in a room(I cleaned a lot), but when I just came there's was a very big humidity in the air(you know, the smell of it...). It's one of my relatives home and I'm very disturb about it. $\endgroup$ – chousa Feb 26 '16 at 19:59
  • $\begingroup$ Could this be larvae of moth? Is this possible? It's 1centimetre long $\endgroup$ – chousa Feb 26 '16 at 20:24
  • $\begingroup$ I added another photo. $\endgroup$ – chousa Feb 26 '16 at 20:27
  • $\begingroup$ I think it might be a moth larva. And I really don't think one larva is reason to be worried! Just remove it and keep an eye out for more of them, in dust or perhaps wool materials. $\endgroup$ – picapica Feb 26 '16 at 20:38

This is likely a case-bearing clothes moth (Tinea pellionella). Though more information and a better image would aid in confirming that to be the case.

Here are some pictures:

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