The Primula Scotica, a.k.a. Scottish Primrose is a rare flower found on Orkney and possibly on the North Coast of Scotland. I walked along the cliffs of Yesnaby (which were really spectacular) and only spotted one little Primrose. They have a second flowering in July so perhaps the cliffs will be abundant with primroses in a couple of weeks.
Other sitings on my little trek included the Common Blue butterfly (sadly not a native of Scotland)
A bonxy (Great Skua - another species on my tough challenge list). Here it is calling out to its buddies
I got too close to the skua so it flew away. Apparantly they attack humans so I'm glad this didn't happen to me as I was close to a very high drop.