mystery pest? please help ID

[Calbears]

This picture shows the window sill in one of our bathrooms. I used to have a phrag and a neo on the sill but have since moved them to other locations. One of the reasons for moving them is that I was concerned there may be a pest at work. I've yet to see any moving bugs but these tiny granules (eggs?) build up over a matter of weeks. I'll clean off the window sill but they gradually reappear.

I tried to take the best photo possible but realize it may not be enough to ID what these are.

Any help would be greatly appreciated.

[Bud]

I think that is termite inside the wood and they are slowly eating and carving away producing that kind of granules....

[Calbears]

Thanks Bud. I'm sure you're right on with that diagnosis. A google search of termite feces results in exactly what I'm seeing.

[Calbears]

Here's a link with more information if anyone is so inclined

http://azbugco.com/bugs/drywood-termite-pellets