Last night (7/15) around 8:20 pm I observed 3 common nighthawks, two of them actively vocalizing with "peent" calls. One of the calling birds was observed swooping and diving at the silent bird in mid-air, just over a flat roofed building. This appeared to be a playful mock combat. This is the first I have heard these birds vocalize since 6/24. -- David A. Brinkman 1631 Kellywood Ave. Cincinnati, OH 45238-4011 (513) 675-8665 (Cell) * Please note new e-mail address. ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Our thanks to Miami University for hosting this mailing list. Additional discussions can be found in our forums, at www.ohiobirds.org/forum/. You can join or leave the list, or change your options, at: http://listserv.muohio.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask]