We think that we are bestowed with the superior intelligence with respect to the rest of the animal kingdom. Recently the experimenters at the Primate Research institute in Kyoto University in Japan were able to train a chimp that perform better than humans on memory tasks.
Here is a write up in UK newspaper Guardian on the actual experiment.
One of the video that is a big file(153MB) and takes few minutes to download provides the summary of the experiment showing convincingly that chimp do outperform humans on the short memory task
It seems that chimps have photographic memories and we do not that is why we need to invent media to augment our memories of past experiences.