I'm not real familiar with them either, that's why it took me 4 years to get a couple of decent pics of them. A friend said to look at the highest man made structure (in the general area that you're looking in) and you'll find them on it. So of the 4 that I have seen, 2 were on structures, 2 were on the ground. That's a lot of help isn't it. :D davev.
