Fans of fowls and worshipers of the winged were all aflutter yesterday, because January 5th was National Bird Day. In honor of this occasion, we wanted to showcase some of the extraordinarily gorgeous illustrations from John James Audubon’s iconic The Birds of America. Originally published in a series between 1827 and 1838, the book captured every common bird of North America in incredibly detailed and true-to-scale paintings. You can view the complete set of plates digitally on the University of Pittsburgh’s website. Wouldn’t you just love a framed print of one of these for your own nest?