Clay Bolt is a conservation photographer on a mission. He has started an epic multi-year journey across North America to document our disappearing bees, with the hopes of photographing as many of the more than 4,000 species found on the continent. Among them is the rusty-patched bumble bee.

In a fascinating look at facts about bees, Bolt informed us that the rusty-patched bumble bee's numbers have dropped 87 percent in the past 15 years. "This beautiful bumble bee and other closely related species have been inflicted with an internal pathogen that was introduced into North America when bumble bees imported from Europe to pollinate greenhouse tomatoes escaped into the wild and came in contact with wild bees," said Bolt. "Believe it or not, despite all of the news that we hear about the decline of bees, there isn’t a single species out of the approximately 4,000 species of native North American bees that enjoy federal protection here in the U.S."

Fortunately The Xerces Society for Invertebrate Conservation has filed a petition to get the rusty-patched bumble bee added to the endangered species list, which would give it federal protections. But with the speed the species is declining, it's something that would have to happen as rapidly as possible. In the meantime, Bolt has journeyed to Curtis Prairie, a 75-year-old restored research site, with the hopes of documenting the species before it disappears. Here is a beautiful, informative and often funny look at what it's like to hunt for a rare bee:

A Ghost in the Making: Searching for the Rusty-patched Bumble Bee from Day's Edge Productions on Vimeo.

Learn more about Bolt's amazing project by visiting his website and following him on Facebook.

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Jaymi Heimbuch ( @jaymiheimbuch ) focuses on wildlife conservation and animal news from her home base in San Francisco.