Ospreyers, Allow me to introduce myself. I just joined the list after reading all your great reports for several months. I'm lucky enough to be a full time student right now working on my master's in Environmental Science at George Mason. I'm hoping to focus on avian repopulation of recreated wetlands. Any and all advice is welcome! My ornithology class had a field trip today at Mason Neck and surrounding areas. I'll post a full report later if I have time, but there was one find which I'm going to specifically share. A trio of 3 birders (didn't get their names) pointed out a Great Horned Owl apparently sitting on a nest across the drive from the visitor's center at Mason Neck. As you are driving towards the visitor's center right before the drive turns into a circle, there is a large white (I think) oak on the right side. The trunk makes separates into 3 about 10 feet from the ground or so. Follow the middle trunk up until it makes a V. If you are lucky you will see two large eyes of a female Great Horned Owl staring back at you. Please do not harass this bird in any way as it is making more Great Horned Owls for us to enjoy! Good birding.... Sue -- Susan Heath Centreville, VA sheath@erols.com