A recent study at the University of Cambridge looked at Eurasian Jays and the links between self-control with other qualities. Similar to the famous "marshmallow experiment" with children, the "worm" test with jays looked at better understanding the variability in delaying gratification and reward with cognitive abilities.
If you want to know more, check out some videos on jays and children. While the link provided is a more recent remake then the
experiment, it is fun to watch. What can be extrapolated from social experiments is always challenging to determine, they can provoke us to consider what is true for us, what do our ideas from these experiments mean to us. Feel free to leave a comment!