Can anyone help with identifying what might be causing this. Beside the small hair loss around the head and face he seems to be fine, there is no redness or itching and he's eating and drinking like normal. Thanks!
Are you talking about between his ear and eye, or is that a bald spot right below his eye, kind of oblog spot? I can't tell of that's a whitefur spot or a bald spot.
The thinning between the ear and eye is actually pretty normal, to me. To ease your mind, I found this thread: http://www.thecatsite.com/t/174543/fur-thinning-near-eys-and-ears BUT, if you are at all concerned, then you should probably take him to be seen by a Vet, as we here out on the internet can't really diagnose something from a picture.
If that other spot isn't a white fur spot, then it's possible he's got ringworm. A Vet can certainly diagnose that, by doing a skin scraping.
I agree the smaller white spot should be seen by the vet. Ringworm would be my bet as well. It's only a small patch, so no need to worry too much but best treat it now.
More about ringworm -
[article="32416"]Ringworm In Cats How To Win The Fight[/article]