The Blue Jay (Cyanocitta cristata) is one of the most recognized and admired birds in North America, known for its vibrant blue plumage, complex vocalizations, and bold, intelligent behavior. These birds are not only visually striking but also play a significant role in their ecosystems as seed dispersers, sentinels, and occasional predators. Understanding the history, physical characteristics, species diversity, and cultural significance of Blue Jays lays the foundation for responsible ownership, care, and observation, whether in captivity or in the wild. This chapter provides a detailed exploration of these topics, suitable for both beginner and professional bird enthusiasts.