A very spectacular image, as a scientist, microscopist and amateur cocktail enthusiast I'm extremely interested in recreating this photograph. I would love to talk to the photographer, I deduce that the Kahlua was thinned with vodka to reduce it's density and layered above the cream. The bubble at the surface makes me wonder if gelatin was used to thicken the vodka. I suspect the glass was inclined at a 45 degree angle and a small splash of cream/milk was added giving he impression that the cream at the bottom is spontaneous. This image is pure genus, I would really love to know how this image was created, there is also some interest on reddit (r/cocktails).
As a Dudeist Priest, this is the report I have received: Vodka alone (rocks or neat-doesn't matter) is a "Russian." Vodka & Kahlua is a "Black Russian." Vodka, Kahlua & cream is a white Russian. Furthermore, if you get a box of Yoo-Hoo chocolate drink & dispose of half of it & refill the box with vodka, you've got a "White Trash Russian."
I bought the Old Mr. Boston De Luxe Official Bartender's Guide. It does not list a White Russian or a Dirty Bird. It lists a Russian Cocktail which is Gin, Vodka, and Creme de Cacao . It also lists a Russian Bear Cocktail which is Vodka, Creme de Cacao, and sweet cream. That is what is closests to what people now know as a White Russian. And it is the regular Creme de Cacao. The only drinks it lists with White Creme de Cacao are all grasshoppers and something called a Pink Squirrel. Just FYI.
jeffreyblaismanetzerocom687816 is wrong. I made this account so that I could simply say, he is wrong. A Dirty Bird is essentially a White Russian with a quick shake added at the end. White Russian has been around, in this format, since the 30's. Learn to research you noob!