What does the question "Are you submitting a complete checklist of the birds you saw/heard?" really mean?
The goal of this question is to find out whether you are reporting all the birds you were able to identify to the best of your ability. In other words, answer "Yes" to this when you are submitting more than just the highlights of your birding event, and you have tried to note all the species present. We realize that all birds are not identifiable, and user abilities vary, but you should always answer "Yes" to this question unless you have purposefully excluded some species (e.g., European Starlings, etc.) from your checklist. You need not have counted all the individuals you saw to answer "Yes" to this question. By submitting a complete checklist of birds and answering "Yes" to this question we can know not only what birds you saw, but we can say with confidence that you didn't detect a suite of additional species that might be present in your area. This allows us to research matters of species detection, and to accurately map where birds are, and where they are not.