This egg was only available in Egg Cave's Cash Shop Park for June 2015.
A single Osi egg in an open field can exhale an intense perfume able to attract any nose around in a radius of five hundred meters. For some reason, there's always a Buzzle flying around an Osi egg.
Nobody knows how Osis came to Ark. The Science and Research Center believes they originated from a very rare orchid, located at the base of the Volcano. However, the Ark citizens believes in a different story.
The Ark residents tell that, a very long time ago, a woman named Viola suffered the loss of her beloved. Mike left to a hard journey around the island but he never came back. Viola searched for him everywhere but she didn't have any success. Tired, Viola sat down in Ark Fields, not too far from the shore, and simply cried. Some say she'd been there for days, only crying, while all the tears were rolling through her face and accumulating on the ground around her.
But then, she disappeared. The other citizens could only smell her flower perfume in Ark Fields, the same perfume her beloved used to adore. A few weeks after, some little pink flowers started to grow up just on that place. And then came another surprise.
What seemed to be flowers were actually birds but not just any kind of birds. The citizens believe that the potential whistles of Osis were inherited from Viola's hiccups and their typical odor from Viola's perfume.
Perhaps Osis are still trying to guide Mike back to his real true love, Viola.