National Geographic nature photographer Jim Brandenberg shot a series of images, one for each day of spring in his native Minnesota. You can see the slide show here. It goes by very quickly so you might want to keep your mouse poised over the pause button in the lower left corner.
This is a recent posting on Proof which National Geographic describes as:
Proof is National Geographic’s online photography journal. We showcase the voices of National Geographic photographers and editors to offer a behind-the-scenes look at the visual storytelling process. Proof also features work from emerging photographers, books, galleries, and portfolios across the web. We aim to present an ongoing conversation about photography, art, journalism, and the people who create it.