In this talk I will discuss the methodology used to study the semantics of cattle appearance among the Hamar of South West Ethiopia, and I will outline the preliminary results from the fieldwork carried out between January and March 2020. Note: This talk has not gone through a process of peer review, and findings should therefore be treated as preliminary and subject to change. Acknowledgement and citation: Petrollino, Sara. 2020. The investigation of 'appearance' in Hamar: methodological challenges and preliminary results. Talk given at the Rift Valley Network Webinar Series. 04/06/2020.