<p>Most research on the process of process mining has focused on exploratory process mining, which is defined as a first exploration of process data to find interesting insights and develop hypotheses. Within this research topic, the focus has been so far on better understanding the behavior of the process mining analysts. However, a comprehensive overview of exhibited behaviors has yet to be established. Such an overview enables a direct comparison of empirical findings and serves as a tool for documenting exploratory process mining behavior. Drawing from (human) ethology, the study of behavior, this paper introduces a catalog of behaviors for exploratory process mining, better known as an ethogram. Through a systematic analysis of published process mining case studies, we identified a first list of behaviors performed during exploratory process mining. This first list was validated and updated using 15 interviews with experienced process mining analysts. The final ethogram consists of 31 behaviors, including “Inspect graphic”, “Check assumption”, and “Define question”. This ethogram provides a vocabulary to describe exploratory process mining behavior in a structured way, contributing to a more comprehensive understanding of the role of a process mining analyst.</p>