It started with just the corner of a fascia board and now has appeared in a bunch of other places. The fascia is cypress and the shingles are cedar. The only place the damage is being done is on the south or west side of the structure (an "out" building). It looks like it's being chewed. The attached pictures give you a pretty good idea what it looks like.
The house, which has the same siding and is about 50 feet away, is not affected at all.
Any clues and solutions gladly accepted !