Hinterland Who's Who
Blue jays cache so many acorns they forget where they put them - Grand Forks Herald
Blue Jay
Blue Jay (Birds of Sagamore Hill National Historic Site) · iNaturalist
Blue Jay - South Dakota Birds and Birding
Blue Jay (Birds of Overton Park's Old Forest, Memphis, TN) · iNaturalist
Hinterland Who's Who - Hinterland Who's Who
Blue Jay Identification, All About Birds, Cornell Lab of Ornithology
Why are American crow and raven the same species? - Quora
Hinterland Who's Who - Blue Jay
Birds of the Pacific Northwest: The Steller's Jay