James -- We may be the closest to you, in Sherwood Forest (off Beaumont, which is off Sherwood Forest Dr.) We know where Vierling Dr. is. We wouldn't mind coming by and looking at your flycatchers -- the only "catch" is that I have dog shows the next three days, so may not be able to get over during the peak times. Will see if I can coerce my husband Barry to have a look. We'll call beforehand. Oh, in case someone else comes by email me with the "diagnosis"-- thanks, Gail Mackiernan 216 Mowbray Rd. Colesville 301-989-1828