Interesting! I have to check this - at least for a birds that I have no idea what they are! On other hand - I have seen plenty of misidentified photos on the Internet and you easily can get in trouble... Sometimes the differences are so small and the info in the photo is just not enough.
I still think there is nothing better of few good books and careful reading (few books because in every book you may find some small things that can help you in case of doubt!).
Just for example: I don't believe a real ornithologist will use Bing to ID a bird

! It needs more than Bing. On other hand Bing I hope can help you to narrow the scope of your search if you use it with grayn of salt and... well you are again in the teritory of the good books!