A owl with his yearly offering. There are thousands of spotted owl sites in California, and many of them are visited every year to determine nesting status. Only about 50% of the total NSO habitat in California is even being surveyed, which means there could be as many as 8,000 spotted owls in CA. While logging in the 1950s-1960s severely effected NSO nesting habitat, it would appear at least in CA, that the NSO has made a impressive recovery. Especially in forests of the Wildcat (behind Ferndale) where there the Spotted Owl thrives at densities 2-3 times higher other areas in the Pacific North West.