Since too much light can destroy their delicate colors, we rotate the displays in this Niche every three months. From his early 20s, Audubon was obsessed by one idea: to observe, record and publish images of all of the species of birds in North America. During his life, people recognized Audubon's bird watercolors as both important documents of natural history and dazzling works of art. Audubon was one of America's greatest watercolorists and he depicted birds in new ways. He was the first to show birds life size and interacting with each other, and also showed different sexes, ages and seasonal plumages of the same species. We also value his images because they include species that became extinct, and today they live only in his watercolors. Audubon and his wife Lucy hoped that his collection of watercolors would stay in the United States after his death in 1851. Both the New-York Historical Society and the British Museum wanted to buy the collection, but the $4,000 asking price for the collection was a large sum at the time, and too high for the Historical Society. For a while it seemed that the bird paintings might end up in the UK, but after a year of private fundraising, the Historical Society acquired the collection of 434 preparatory watercolors for The Birds of America in 1863, along with around 50 other works. Later in the 1960s, donors gave the Historical Society the final preparatory watercolor and a rare copy of whats called the double-elephant folio edition of The Birds of America, printed on the largest size of paper available. And those gifts made this national treasure complete.