To create realistic details of the dove, the artist would typically use techniques such as value (to depict light and shadow), texture (to show the surface quality of the feathers), and positive/negative space (to create a balanced composition).
However, perspective is not typically a technique used to create realistic details of the dove itself, as it focuses more on how objects relate spatially in a composition rather than detailing the form of the dove. Therefore, the artist would NOT primarily use perspective to create realistic details of the dove.
So the answer is perspective.