Yup, magpies. The harlequin gene is coded e(j)--the lower case 'e' shows that this possible outcome on the 'extension of color' gene is recessive to other possible choices (called alleles). The 'j' part is because this pattern was originally called Japanese pattern. In harlequin, the agouti bands of color that are all on one hairshaft, the main color and yellow (fawn) bands, are instead spread in separate patches on the skin. Sometimes in splotches that change position right down the center spine (called bars), sometimes in stripes (called bands), sometimes just intermixed like a roan horses (called brindle), and sometimes just in a random pattern.
Chinchilla is a choice (allele) on the 'C' Color gene, where there are five choices in descending dominance. The most dominant, coded with a capital letter, is C for full-color. These are all your 'normal' colors like chestnut agouti, opal, lynx, tortoiseshell, black, lilac, chocolate, harlequin with fawn background, etc. Their genetic color possibilities of both dark (black, blue, chocolate or lilac) and yellow (fawn, cream, orange, red) are fully expressed. Chinchilla is the next allele down, coded c(chd) for 'chinchilla dark'. Here, the yellow pigment factory is shut down, but the dark pigment is still fully produced. So, a rabbit with chinchilla as the dominant allele has the normal agouti hair color on the outer agouti band (chocolate, black, blue or lilac), but the fawn middle band is now pearly white instead.
Translate that to your harlequin patterned rabbits, and the background that would have been fawn, is now pearly white, so you have the bars/bands on a pearly white background, which we call magpie.
You also have the dominant broken gene, coded En because it is the primary spotting gene in the English Spot breed. It takes whatever the color pattern is, and breaks it up with splotches of white (which is why it is called 'broken', the pattern is broken up with white). Regular harlequins (main color plus fawn) are called tricolor when broken up with white, as they are now main color + fawn + white. However, this is a problem with magpies, as it isn't tricolor, just color plus pearly white plus white, and you just end up with what looks like a mis-marked magpie pattern.
Look at the striping on your magpies, and on the ears. The kit with black striping would be called a black magpie. If the stripes were chocolate instead, it would be a chocolate magpie; same goes for blue or lilac. The pattern is quite striking in magpies, as the difference between color and white is so clear. My chocolate/fawn Angora harlequin rabbits tend to get their colors muddied together, if you took a black & white photo, the colors would be of about the same intensity and not show up at all, while a chocolate/pearl white mix would be very noticeable. The pattern sure is cute, isn't it?
