In "The Son of Neptune" by Rick Riordan, the narrative introduces various mythical and legendary creatures that diverge from common North American birds. The mention of Laistrygonians and Cannibals evokes the chaotic and dangerous world of ancient myth, emphasizing a blend of Greek mythology with elements of folklore.

The reference to Northern Giants and Sasquatch legends adds an intriguing layer, highlighting the fusion of different cultural legends and the idea of beings that are far removed from ordinary wildlife. This creates a vivid backdrop for the story, showcasing Riordan's knack for weaving myth into the contemporary setting.