In the summer of 2012, I was an intern at the Laboratory of Compared Ethology and Cognition in Nanterre, France.
My supervisor wanted to test the learning abilities of common domestic canaris Serinus canaria, so I co-designed with her and carried out a learning task. The basic principle of the task is the following: remove the obstacles to get the food hidden underneath. We guided our subjects through 4 levels of difficulty, the criterion of success being to eat out of at least 2 (out of 10) wells in the 15 minutes allocated for the task.
That particular individual was rather “gifted” compared to others, since he was the first one to complete the 4 levels of the task. I am therefore pretty sure that he could have finished eating all the bits of food, i.e. uncover the 10 wells. Maybe the fact that, at some point, the camera almost fell of the tripod troubled him in some way. Maybe.