Phenology is the study of periodic plant and animal life cycle events and how these are influenced by seasonal and interannual variations in climate.
(Not to be confused (as I did) with Phrenology - A pseudoscience that hypothesises that the personality traits of a person can be derived from the shape of the skull. With that in mind imagine reading the following sentence:-
"The phenology of the blackcurrant leaf midge."
I imagined people studying the lumps on a leaf midge's head to figure out its personality!)