Protest-Trumpet
A Trumpet given in protest to some unpleasant or disturbing. It may often be given in association with Head-Shaking and is a sign of an individual's annoyance with or disapproval of an individual or circumstance. We only have a couple of examples of what we would call Protest-Trumpets, one given in water, and they sound very different from one another. For the moment, therefore, the term Protest-Trumpet is a catch-all term for Trumpets given in the context of what appears to be disapproval, annoyance, indignation at some unpleasant or disturbing incident or circumstance, as opposed to an Alarmed-Trumpet given in response to something that causes fear or alarm. It remains to be seen whether such trumpets are statistically different from one another.
References: Poole & Granli 2021. (Full reference list)
This behavior occurs in the following context(s): Social Play, Protest & Distress