Drew, thanks for the ref's. DGR375, I do have a complete set of the DDJ. If the kind sir Down Under would like an article or two...three....PM and lets see what we can do. I worked as a student for an Aussie scientist on sabatical at the NIH who later was appointed as full professor at Monash University. We did hunt birds and had a grand time near Thurmont, MD. Still keep in touch with him. Hope to visit Melbourne when this pestilence subsides.