Final answer:
The question 'A mallard's playing card set' is related to Biology, focusing on the representation of animal motifs in human culture and the biological characteristics of ducks like webbed feet.
Step-by-step explanation:
The subject aimed at by the question 'A mallard's playing card set' is primarily Biology. Within the field of Biology, the topic seems to be related to animal motifs and their representation in human culture, as suggested by the context given about Mediterranean art and Egyptian hieroglyphs. Additionally, elements pertaining to ecology can be inferred from the mention of waterfowl characteristics such as webbed feet, which differentiate ducks from other birds. Moreover, the references imply connections between animal behavior, such as migration patterns of ducks, and their representation in various cultural artifacts. This can bridge into interdisciplinary topics involving Biology, Art, and Cultural Studies.