Out on our 5th floor lanai in BKK, occasionally notice these tiny creatures moving in a very slow jerky fashion. In the pix, it appears large...but is really just 1.5 cm (about a half inch) with it's tiny head extended. Didn't pay much attention to them initially, but recently saw one and it kinda sorta reminded me of a leech, which it is definitely not. Further research revealed it to be the larval stage of the Case Making Clothes Moth (Tinea pellionella). Bizarre looking things. Fortunately never see them indoors. 

 

 

 

 

Apologies! Have no idea how the above got posted to the Motor Forum! Perhaps the mods can direct it to a proper place. 

Edited April 19, 20188 yr by Skeptic7

Yes Case moth pupae. Harmless. They tend to head high up the walls to wait their next stage. If too many appear my wifey will knock then down with a broom and throw them outside.

Interestingly, the caterpillar seems to be able to turn around inside its case and head in the opposite direction if disturbed.