I don't have direct involvement with eBird (except to submit checklists occasionally), but as I scientist I would say it's always better to indicate presence, even if you don't know the exact number. Leaving out known information is never the best thing to do. Blake Mathys --------------------------------- http://blakemathys.com/ --------------------------------- ________________________________ From: Ohio birds <[log in to unmask]> on behalf of Ian Lynch <[log in to unmask]> Sent: Tuesday, March 27, 2018 12:07 PM To: [log in to unmask] Subject: Re: [Ohio-birds] The problem with "X" - an explanation from eBird "...whether it would be better to leave out a common species that I know I've encountered on the trip than to include it as an X." ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Please consider joining our Society, at www.ohiobirds.org/site/membership.php. Our thanks to Miami University for hosting this mailing list. You can join or leave the list, or change your options, at: listserv.miamioh.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask]