What is a good hypothesis for my ethogram ?

[DrJ]

An ethogram is just an encyclopedia of behaviors.

Now, if you could figure out the proximal situation that illicits a particular behavior, or if you could come up with a probability tree that shows the likelihood that one behavior follows another, then you could perhaps figure out the underlying rational for the behavior. If you could show some ecological basis/efficiency for a particular behavior, then that also would lead to a greater understanding.

Without that, you might as well be describing the types of vegetables in a market. At least in a market, you have a sample size of more than one.