There is a interm resource before a book might be down. There is a printable and viewable distribution state checklist. Directions in the last Bird Notes Jeff Palmer did a lot of work updating it.
Directions
Go to SDOU site. Www.sdou.org Log in if member but nonmembers can view also
2. Go to menu 3. Go to site map 4 . Go to printable checklist 5 . Scroll down 6. Check distribution checklist or seasonal checklist box 7. I checked seasonal 8. The species in order are there scroll down to desired species. 9. I went to Eastern Bluebird and done this screen shot
10. As you see reported 8 of 10 winters in SD
There are also printable checklists for west. River. And east parts of SD
Then state checklist for species seen I winter fall. Spring and summer
Also a person could go to the SDOU database do a search for species- eastern bluebird and December and you could see all counties reported in
Also search by species with county etc
I am amazed amount of data amassed before EBird and some peoples data after EBird
