Maybe arguing is the wrong word. For me it's the person that wants to turn a chook into a night parrot if you get what I mean. They can't be corrected even when everyone else only sees a chook they still argue night parrot.What do you guys mean by "arguing"? I have never gone birding in a group - at most it's been with one person (actually once with about five people but only two of us were looking for birds and the others were just there) - so is this actual arguing? What are they arguing about?