As you see from the comments on the Facebook page and blog, there are differing opinions regarding the number of crows present in this challenging image provided by Joe Jankowski:
http://REINDEER.cc.trincoll.edu/CompostResearch/Actual/R9/MIX_R9S_101017_12-15-12_V_06_10.JPG
Ron Miller in his comment mentions the limitations imposed by looking at a single image out the context of its consecutive images. Very good point! I don’t mean to beat a dead horse, but use of the consecutive images for each and every categorization is the best route to accurate analyses. Okay, use this video to simulate the consecutive image feature and see what you think.
challenging crow MIX R9S 101017 12-15-12