I read a lot of people advocating about the Audobon field guide but it only comes in two books - eastern and western trees. To anyone who is using the Audobon field guide, did you find an edition that combined the eastern and western trees? Also, does anyone recommend Sibley? People are saying that you shouldn't use it because it has drawings instead of pictures but does anyone else have an opinion on this? Would having drawings have a disadvantage to pictures?
no, i don't believe there is an edition of the audubon series containing both east and west trees.
with ornithology last year, i really liked drawings because they could show you field marks and traits that a photograph might not be able to show. but as for trees, they don't move and it is fairly easy to take good, quality, and helpful pictures, personally, i am determined to get a photograph field guide.
I personally used peterson instead of sibley for ornithology, so i don't really like the sibley series due to the fact that their layout is something i can never get used to. also, i don't really like audubon as an ID book, more of a fact book to copy down facts, and i don't think it would be good to take it into competition due to the fact that the plates are on different pages than the information.
there, i think ive answered most of your questions...i hope my reply helps