For those who have not yet heard, public television's "Nature" will air a program on the interdependence of two diminishing species--the red knot and the horseshoe crab--this Sunday night, at 8 on many stations, but check your local listing. Involved is the knot subspecies we see here in Ohio: Calidris canutus rufa. We see them usually in fall, mostly inexperienced juveniles that stray from the main track the adults have followed earlier. Colorful northbound adults in spring are pretty rare here, but we'll see many of them in this film, and learn about their migrations, and those of the ancient horseshoe crabs as well. We'll also see some of the selfish offensive things humans do that imperil these birds (and the crabs they depend on) as they stop along an inspiring journey of many thousands of miles to the breeding grounds. Bill Whan Columbus ______________________________________________________________________ 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]