Chimps too can plan for future

In re-reading this comment, I realize I should clarify something. I didn't mean all people who visit zoos are idiots, just the ones who don't know the difference between a monkey and an ape. Zoos are great places to learn, I just wish more people used them as a learning resource while they were there.

It would be nice to see documentation of unique days. IE a national holiday when the zoos open early, or when they open late or something. I mean does the chimp still collect stones when the zoo is going to be closed, or is it caught off guard when people arrive in the zoo earlier than he expects.

The mere fact he collects stones before the zoo opens does suggest they anticipate things. However, it would be nice to see that he's anticipating something based on experience. If the Zoo's closed on Monday because it's a national holiday, does he still collect stones? Or is something the trainers doing tipping him off to people arriving?