The Audubon Core vocabulary terms subjectPart and subjectOrientation are used to describe the depicted part of an organism and its orientation in an image. We describe the criteria and process for developing controlled vocabularies for these two terms. The vocabularies take the form of Simple Knowledge Organization System (SKOS) concept schemes and their terms are categorized using SKOS collections to allow users to select from particular sets of values appropriate for particular organism groups and their parts. We also report the results of implementation testing used to determine the usability of the proposed terms with actual images of living organisms and preserved specimens.