I dont think the "Lemon Cuckoo" pattern exist in the Maran breed(would not be hard to breed) as in Lemon cukcoo orps(use goole o see pics) but I think you may refer to whats called, Golden cuckoo maran, while golden and lemon may describe a similar color, the pattern names have totally different looks on the bird..Any one know what you'll get if you cross a Lemon Cuckoo Maran Rooster with a Rhode Island Red Hen? One Chick just hatched its black with a blonde stop on the crown and a dark brown breast... Still in down tho... Also what about a Brown Leghorn Hen and a Lemon Cuckoo Maran Rooster??? JTLYK he is black and white barred on bottom (like a barred rock) and dark (like a golden cuckoo maran) on top. Iv'e seen some google results showing full buff lemons so i'm still not sure what the difference is...
golden cuckoos are like plain cuckoos except they show golden/yellow color to their hackles, saddles and shoulders(straw/gold barring feathers) now this birds are based on the ER birchen allele which is dominant over the RIR wheaten e allele, so you will have the chicks to be ER/eWh and the headspot you see on the chick is because the father was barred, the chicks cant be sex, so that chick cant be sexed at hatch