The Σκιάποδες (Skyapodes, 'Shadow-feet') are a mythical race described by Herodotus (4.18) and later sources, characterized by their ability to shade themselves from the sun by lying flat and using their oversized feet. While they appear in various geographical lists of the 'ends of the earth' (e.g., in Ctesias or as part of the 'wonderlands' in travel narratives), their specific inclusion here alongside a lake in the bird-kingdom of Cloudcuckooland represents a deliberate conflation of the terrestrial 'monstrous races' with the utopian geography of the play's invention. The phrase 'πρὸς δὲ τοῖς' (besides/near) implies a spatial arrangement within the birds' new domain that incorporates known mythical locales, signaling to the audience that this is a world where the boundaries of the known and the fabulous are collapsed.