A trunk-to-mouth greeting ritual. Yes. We are talking about elephants here.
In infancy you can observe an explosive growth. A lot of researchers focus on this age group and observe parent-infant dyads to get more insight in specific behaviors.
Infusion Systems Ltd, manufacturers of the I-CubeX family of sensors have published a web page about behavior measurement
Noldus provides many solutions for research on the behavior of both animals and humans. On occasion, a Noldus solution is used for both animal and human research at the same time.