Editing Observational learning (section)

===Hummingbird experiment===
Experiments with hummingbirds provided one example of apparent observational learning in a non-human organism. Hummingbirds were divided into two groups. Birds in one group were exposed to the feeding of a knowledgeable "tutor" bird; hummingbirds in the other group did not have this exposure. In subsequent tests the birds that had seen a tutor were more efficient feeders than the others.<ref>{{cite journal | last1 = Altshuler | first1 = D. | last2 = Nunn | first2 = A. | year = 2001 | title = Obeservational learning in hummingbirds | journal = The Auk | volume = 118 | issue = 3| pages = 795–799 | doi=10.2307/4089948| jstor = 4089948 | doi-access = free }}</ref>