The left-over/concentration of eumelanin in the outer edges of the feathers is what creates the 'edged' or marbled appearance. The reason the edging occurs is because the reduction of the eumelanin is happening mainly in the center of the feather. Marble is an autosomal recessive gene that was previously referred to as "Pastel." Marble is a eumelanin mutation that results in the appearance of 'edging' on the covert and primary feathers. (Note: Fallow and Ino babies will also have clear toenails even if they are not pied). A little trick to identify pied babies is they often have clear toenails. ![]() Pied birds produce both pied and non-pied offspring. You can see examples of this in some of the wing photos below. The difference will be in the overall body color. For any pied birds, pure pied primary flight feathers will have a white rachis, similar to American birds. In Turquoise pied birds, any pied feathers in the forehead will always be yellow due to Turquoise birds having Turquoise Foreheads. In a turquoise bird, since it's an intermediate color, the bird can have both yellow AND white feathers. In a blue bird, the pied feathers will be white (since the bird cannot produce lutein, the pigment responsible for yellow color). In a green bird, pied feathers will be yellow. Meaning a single copy present will produce pied feathers - the degree to which is highly variable and not all that predictable. Whereas many of the parrotlet mutations are recessive genes that require a bird to possess both copies for them to phenotypically (visually) express the color, the Pied gene is a single acting gene on the body feathers of the bird. For instance - Green is the dominant form, and introducing two copies of the recessive American gene produces a visually Yellow bird. Pied is a dominant trait that can be a little tricky to grasp because there is no 'recessive' counterpart. Consistency would make sense, but that's not what the bird world is all about. ![]() Plus - American Yellow and American White describe a phenotype, and if you're going to be proper, it should be American Green (the American gene present on a green-bodied bird) and American Blue (the American gene present on a blue-bodied bird) - we see this already with American Turquoise (the American gene present on a turquoise-bodied bird). It describes nothing about how the gene behaves and purely identifies its location of discovery. So you will often see Yellow Parrotlets advertised as "American Yellows." But, if you ask me, this is a bit silly. Truly - the gene itself is referred to as "American" because it was discovered in America. It's interesting to note as well that in pied birds, pure pied areas of the primary feathers in Pied series birds will also have a white rachis matching up with the pied sections of the feather. If you have a Marble bird that is also American, the rachis will be white right up to about 1/2 inch before the end of the feather which will be characteristically gray in color as seen in all Marble birds. ![]() In American birds (where no Ino is inherited) you will *always* see a white rachis in the primary flight feathers. It's interesting to note that the structural blue pigment is only affected in the body color feathers and NOT the sexually-dimorphic areas of the bird, suggesting the pathway isn't completely incapacitated but that in some metabolic pathways it has at least been disrupted. The seller will arrange the return pick up for these items.įor seller-fulfilled items from Sports collectibles and Entertainment collectibles categories, the sellers need to be informed of the damage / defect within 10 days of delivery.The American mutation is a recessive gene affecting the wild-type bird where structural blue color is interrupted, leaving a dark eyed bird that is visually yellow in color if the base color is green. These items are not eligible for self-return. Note: For seller fulfilled items from Books, Movies & TV Shows categories, the sellers need to be informed of the damage/ defect within 14 days of delivery.įor seller-fulfilled items from Fine Art category, the sellers need to be informed of the damage / defect within 10 days of delivery. Learn more about returning seller fulfilled items. If you do not receive a response from the seller for your return request within two business days, you can submit an A-to-Z Guarantee claim. If you’ve received a seller-fulfilled product in a condition that is damaged, defective or different from its description on the product detail page on Amazon.in, returns are subject to the seller's approval of the return. The return timelines for seller-fulfilled items sold on Amazon.in are equivalent to the return timelines mentioned above for items fulfilled by Amazon.
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