Numbers, numbers, numbers...

Still obsessing with the numbering of my life list...  Am currently studying sandpiper photos, trying to decipher my poor blurry photos, most taken four years ago.  Feeding style?  I figure I'm doing well to remember where I took the dang photo!!  But I wonder about the numbering.  Would they go onto my list according to the date that I took the picture, or the date that I finally figured out what they were?  Sigh...  I think I've got the hawks figured out, anyways...  Got a bonus - had a photo where I couldn't decide,  had it in a folder for "no ID" but am pretty sure it's a Cooper's Hawk - one I hadn't added to my life list, so yay!