
A piebald or pied animal is one that has a pattern of unpigmented spots (white) on a pigmented background of hair, feathers or scales. Thus a piebald black and white dog is a black dog with white spots. The animal's skin under the white background is not pigmented.
Location of the unpigmented spots is dependent on the migration of
melanoblast
A melanoblast is a precursor cell of a melanocyte. These cells migrate from the trunk neural crest cells (in terms of axial level from neck to posterior end) dorsolaterally between the ectoderm and dorsal surface of the somites.
See also
*Biolo ...
s (primordial pigment
cells
Cell most often refers to:
* Cell (biology), the functional basic unit of life
* Cellphone, a phone connected to a cellular network
* Clandestine cell, a penetration-resistant form of a secret or outlawed organization
* Electrochemical cell, a d ...
) from the
neural crest
The neural crest is a ridge-like structure that is formed transiently between the epidermal ectoderm and neural plate during vertebrate development. Neural crest cells originate from this structure through the epithelial-mesenchymal transition, ...
to paired bilateral locations in the skin of the early
embryo
An embryo ( ) is the initial stage of development for a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sp ...
. The resulting pattern appears symmetrical only if melanoblasts migrate to both locations of a pair and proliferate to the same degree in both locations. The appearance of symmetry can be obliterated if the proliferation of the
melanocyte
Melanocytes are melanin-producing neural-crest, neural crest-derived cell (biology), cells located in the bottom layer (the stratum basale) of the skin's epidermis (skin), epidermis, the middle layer of the eye (the uvea),
the inner ear,
vagina ...
s (pigment cells) within the developing spots is so great that the sizes of the spots increase to the point that some of the spots merge, leaving only small areas of the white background among the spots and at the tips of the extremities.
Animals with this pattern may include
bird
Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...
s,
cat
The cat (''Felis catus''), also referred to as the domestic cat or house cat, is a small domesticated carnivorous mammal. It is the only domesticated species of the family Felidae. Advances in archaeology and genetics have shown that the ...
s,
cattle
Cattle (''Bos taurus'') are large, domesticated, bovid ungulates widely kept as livestock. They are prominent modern members of the subfamily Bovinae and the most widespread species of the genus '' Bos''. Mature female cattle are calle ...
,
dog
The dog (''Canis familiaris'' or ''Canis lupus familiaris'') is a domesticated descendant of the gray wolf. Also called the domestic dog, it was selectively bred from a population of wolves during the Late Pleistocene by hunter-gatherers. ...
s,
fox
Foxes are small-to-medium-sized omnivorous mammals belonging to several genera of the family Canidae. They have a flattened skull; upright, triangular ears; a pointed, slightly upturned snout; and a long, bushy tail ("brush").
Twelve species ...
es,
horse
The horse (''Equus ferus caballus'') is a domesticated, one-toed, hoofed mammal. It belongs to the taxonomic family Equidae and is one of two extant subspecies of ''Equus ferus''. The horse has evolved over the past 45 to 55 mi ...
s,
cetaceans
Cetacea (; , ) is an infraorder of aquatic mammals belonging to the order Artiodactyla that includes whales, dolphins and porpoises. Key characteristics are their fully aquatic lifestyle, streamlined body shape, often large size and exclusively c ...
,
deer
A deer (: deer) or true deer is a hoofed ruminant ungulate of the family Cervidae (informally the deer family). Cervidae is divided into subfamilies Cervinae (which includes, among others, muntjac, elk (wapiti), red deer, and fallow deer) ...
,
pig
The pig (''Sus domesticus''), also called swine (: swine) or hog, is an omnivorous, domesticated, even-toed, hoofed mammal. It is named the domestic pig when distinguishing it from other members of the genus '' Sus''. Some authorities cons ...
s, and
snake
Snakes are elongated limbless reptiles of the suborder Serpentes (). Cladistically squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales much like other members of the group. Many species of snakes have s ...
s. Some animals also exhibit colouration of the irises of the eye that match the surrounding skin (blue eyes for pink skin, brown for dark). The underlying
genetic cause is related to a condition known as
leucism
Leucism () is a wide variety of conditions that result in partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. It is occasionally spelled ''le ...
.
In
medieval English "pied" indicated alternating contrasting colours making up the
quarters of an item of costume or
livery
A livery is an identifying design, such as a uniform, ornament, symbol, or insignia that designates ownership or affiliation, often found on an individual or vehicle. Livery often includes elements of the heraldry relating to the individual or ...
device in
heraldry
Heraldry is a discipline relating to the design, display and study of armorial bearings (known as armory), as well as related disciplines, such as vexillology, together with the study of ceremony, Imperial, royal and noble ranks, rank and genealo ...
.
Etymology
The word "piebald" originates from a combination of "pie," from "
magpie
Magpies are birds of various species of the family Corvidae. Like other members of their family, they are widely considered to be intelligent creatures. The Eurasian magpie, for instance, is thought to rank among the world's most intelligent c ...
", and "bald", meaning "white patch" or spot. The reference is to the distinctive black-and-white plumage of the magpie.
Horses

In
British English
British English is the set of Variety (linguistics), varieties of the English language native to the United Kingdom, especially Great Britain. More narrowly, it can refer specifically to the English language in England, or, more broadly, to ...
''piebald'' (black and white) and ''
skewbald
Skewbald is a colour pattern of horses. A skewbald horse has a coat made up of white patches on a non-black base coat, such as chestnut, bay, or any colour besides black coat. Skewbald horses which are bay and white (bay is a reddish-brown col ...
'' (white and any colour other than black) are together known as ''coloured''. In
North American English
North American English (NAmE) encompasses the English language as spoken in both the United States and Canada. Because of their related histories and cultures, plus the similarities between the pronunciations (accents), vocabulary, and grammar ...
, the term for this colouring pattern is
pinto
Pinto is a Portuguese, Spanish, Jewish (Sephardic), and Italian surname. It is a high-frequency surname in all Portuguese-speaking countries and is also widely present in Spanish-speaking countries, Italy, India (especially in Mangalore, Karnata ...
, with the specialized term
"paint" referring specifically to a breed of horse with
American Quarter Horse
The American Quarter Horse, or Quarter Horse, is an American breed of horse that excels at sprinting short distances. Its name is derived from its ability to outrun other horse breeds in races of or less; some have been clocked at speeds up to ...
or
Thoroughbred
The Thoroughbred is a list of horse breeds, horse breed developed for Thoroughbred racing, horse racing. Although the word ''thoroughbred'' is sometimes used to refer to any breed of purebred horse, it technically refers only to the Thorough ...
bloodlines in addition to being spotted, whereas ''pinto'' refers to a spotted horse of any breed. In American usage, horse enthusiasts usually do not use the term "piebald," but rather describe the colour shade of a pinto literally with terms such as "black and white" for a piebald, "brown and white," or "bay and white," for skewbalds, or color-specific modifiers such as "bay pinto", "sorrel pinto," "buckskin pinto," and such.
Genetically, a piebald horse begins with a
black
Black is a color that results from the absence or complete absorption of visible light. It is an achromatic color, without chroma, like white and grey. It is often used symbolically or figuratively to represent darkness.Eva Heller, ''P ...
base coat colour, and then the horse also has an
allele
An allele is a variant of the sequence of nucleotides at a particular location, or Locus (genetics), locus, on a DNA molecule.
Alleles can differ at a single position through Single-nucleotide polymorphism, single nucleotide polymorphisms (SNP), ...
for one of three basic spotting patterns overlaying the base colour. The most common coloured spotting pattern is called
tobiano
Tobiano is a spotted color pattern commonly seen in pinto horses, produced by a dominant gene. The tobiano gene produces white-haired, pink-skinned patches on a base coat color. The coloration is almost always present from birth and does not ...
, and is a
dominant gene
In genetics, dominance is the phenomenon of one variant (allele) of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and ...
. Tobiano creates spots that are large and rounded, usually with a somewhat vertical orientation, with white that usually crosses the back of the horse, white on the legs, with the head mostly dark. Three less common spotting
gene
In biology, the word gene has two meanings. The Mendelian gene is a basic unit of heredity. The molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. There are two types of molecular genes: protei ...
s are the sabino, frame, and splash
overo
Overo refers to several genetically unrelated pinto coloration patterns of white-over-dark body markings in horses, and is a term used by the American Paint Horse Association to classify a set of pinto patterns that are not tobiano. ''Overo'' is ...
genes, which create various patterns that are mostly dark, with jagged spotting, often with a horizontal orientation, white on the head. The frame variant has dark or minimally marked legs. The
sabino pattern can be very minimal, usually adding white that runs up the legs onto the belly or flanks, with "lacy" or
roaning at the edge of the white, plus white on the head that either extends past the eye, over the chin, or both. The genetics of overo and sabino are not yet fully understood, but they can appear in the offspring of two solid-coloured parents, whereas a tobiano must always have at least one tobiano parent.
Dogs
In many dog breeds the Piebald gene is common. The white parts of the fur interrupt the pigmented coat patterns. Dogs that may have a spotted or multicolored coat, are often called piebald if their body is almost entirely white or another solid color with spotting and patches on the head and neck. The allele is called sP on the S-locus and is localized with the MITF gene. It is
recessive
In genetics, dominance is the phenomenon of one variant (allele) of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and ...
, therefore
homozygous
Zygosity (the noun, zygote, is from the Greek "yoked," from "yoke") () is the degree to which both copies of a chromosome or gene have the same genetic sequence. In other words, it is the degree of similarity of the alleles in an organism.
Mos ...
individuals show this coat pattern, whereas the heterozygous
carriers can be of solid color.
File:Bucovina Sheepdog.jpg, Bucovina Shepherd Dog
File:Can Setter dog GFDL.jpg, Red Irish Setter
The Irish Setter (, literally "red setter") is a setter, a breed of gundog, and family dog originating in Ireland. The term ''Irish Setter'' is commonly used to encompass the show-bred dog recognised by the American Kennel Club as well a ...
without Piebald spotting
File:Irish Red And White Setter 2005.jpg, Irish Setter red and white due to the Piebald gene
File:Biewer Yorkie.jpg, A Biewer Terrier is a Blue and Tan Yorkie with white coat pattern.
File:Beagle 600.jpg, The Beagle
The Beagle is a small breed of scent hound, similar in appearance to the much larger foxhound. The beagle was developed primarily for hunting rabbit or hare, known as beagling. Possessing a great sense of smell and superior tracking inst ...
is usually tricolor by the Piebald gene.
File:Jack Russell Jackie.jpg, Jack Russell Terrier with recessive red and Piebald spotting.
Other animals

Many other animal species may also be "pied" or piebald including, but not limited to,
bird
Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...
s and
squirrel
Squirrels are members of the family Sciuridae (), a family that includes small or medium-sized rodents. The squirrel family includes tree squirrels, ground squirrels (including chipmunks and prairie dogs, among others), and flying squirrel ...
s. A piebald
Eastern gray squirrel named
Pinto Bean
The pinto bean () is a variety of Phaseolus vulgaris, common bean (''Phaseolus vulgaris''). In Spanish language, Spanish they are called . It is the most popular bean by crop production in Northern Mexico and the Southwestern United States, South ...
gained prominence at the
University of Illinois Urbana-Champaign
The University of Illinois Urbana-Champaign (UIUC, U of I, Illinois, or University of Illinois) is a public university, public land-grant university, land-grant research university in the Champaign–Urbana metropolitan area, Illinois, United ...
after many students shared pictures and videos of it online.
Snake
Snakes are elongated limbless reptiles of the suborder Serpentes (). Cladistically squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales much like other members of the group. Many species of snakes have s ...
s, especially
ball pythons and
corn snake
The corn snake (''Pantherophis guttatus''), sometimes called red rat snake is a species of North American rat snake in the Family (biology), family Colubridae. The species subdues its small prey by constriction. It is found throughout the sout ...
s, may also exhibit seemingly varying patches of completely pigmentless scales along with patches of pigmented scales. In 2013, a piebald
blood python was discovered in
Sumatra
Sumatra () is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the list of islands by area, sixth-largest island in the world at 482,286.55 km2 (182,812 mi. ...
. Some
domesticated silver fox
The domesticated silver fox (''Vulpes vulpes'' forma ''amicus'') is a form of the silver fox that has been to some extent domesticated under laboratory conditions. The silver fox is a melanistic form of the wild red fox. Domesticated silver fox ...
es born from the Russian Institute of Cytology and Genetics also carry this coloring.
Bicolor cat
A bicolor cat (also tuxedo cat) is a cat with white fur combined with fur of some other color, for example, solid black, tabby, or colorpointed. There are various patterns of a bicolor cat. The coat patterns range from the Van-patterned, which ...
s carry the white spotting gene (incorrectly called the piebald gene). The same pattern that applies to cats also applies to dogs when the white spotting gene involved is indeed piebald and not another white-causing gene found in dogs. The piebald gene is also found in cows, ferrets, domestic goats, goldfish, guinea pigs, hamsters, rabbits, and fancy rats.
File:Bicolor cat - Black and White.jpg, Bicolor cat
A bicolor cat (also tuxedo cat) is a cat with white fur combined with fur of some other color, for example, solid black, tabby, or colorpointed. There are various patterns of a bicolor cat. The coat patterns range from the Van-patterned, which ...
File:Holstein heifer.jpg, Holstein cow
File:Hausmeerschweinchen drei.JPG, Guinea pig
The guinea pig or domestic guinea pig (''Cavia porcellus''), also known as the cavy or domestic cavy ( ), is a species of rodent belonging to the genus ''Cavia'', family Caviidae. Animal fancy, Breeders tend to use the name "cavy" for the ani ...
s
File:Mesocricetus auratus.jpg, Hamster
Hamsters are rodents (order Rodentia) belonging to the subfamily Cricetinae, which contains 19 species classified in seven genera. They have become established as popular small pets. The best-known species of hamster is the golden or Syrian ...
File:Salon agriculture 2009 - furet recentre.jpg, Ferret
The ferret (''Mustela furo'') is a small, domesticated species belonging to the family Mustelidae. The ferret is most likely a domesticated form of the wild European polecat (''Mustela putorius''), as evidenced by the ferret's ability to inter ...
File:Goat بز 09.jpg, Goat
The goat or domestic goat (''Capra hircus'') is a species of Caprinae, goat-antelope that is mostly kept as livestock. It was domesticated from the wild goat (''C. aegagrus'') of Southwest Asia and Eastern Europe. The goat is a member of the ...
File:Piebald Squirrel Pinto Bean.jpg, Squirrel
Squirrels are members of the family Sciuridae (), a family that includes small or medium-sized rodents. The squirrel family includes tree squirrels, ground squirrels (including chipmunks and prairie dogs, among others), and flying squirrel ...
File:Piebald Deer.png, Deer
A deer (: deer) or true deer is a hoofed ruminant ungulate of the family Cervidae (informally the deer family). Cervidae is divided into subfamilies Cervinae (which includes, among others, muntjac, elk (wapiti), red deer, and fallow deer) ...
Holstein
Holstein (; ; ; ; ) is the region between the rivers Elbe and Eider (river), Eider. It is the southern half of Schleswig-Holstein, the northernmost States of Germany, state of Germany.
Holstein once existed as the German County of Holstein (; 8 ...
and
Simmental
The Simmental (; ) is an alpine valley in the Bernese Oberland of Switzerland. It expands from Lenk to Boltigen, in a more or less south-north direction ( Obersimmental), and from there to the valley exit at Wimmis near Spiez it takes a west-e ...
breeds of cattle typically exhibit
piebaldism
Piebaldism refers to the absence of mature melanin-forming cells (melanocytes) in certain areas of the skin and hair. It is a rare autosomal dominant disorder of melanocyte development.James, William; Berger, Timothy; Elston, Dirk (2005). ''Andrews ...
.
See also
Horse coat
*
Equine coat color
Horses exhibit a diverse array of coat colors and distinctive horse markings, markings. A specialized vocabulary has evolved to describe them.
While most horses remain the same coat color throughout life, some undergo gradual color changes as th ...
*
Equine coat color genetics
Equine coat color genetics determine a horse's coat color. Many colors are possible, but all variations are produced by changes in only a few genes. bay horse, Bay is the most common color of horse, followed by black and chestnut. A change at the ...
*
Pinto horse
A pinto horse has a coat color that consists of large patches of white and any other color. Pinto coloration is also called paint, particolored, or in nations that use British English, simply coloured. Pinto horses have been around since short ...
*
Tricoloured (horse)
Tri-coloured (archaic: ''oddbald'') refers to a horse with three different coat colours in a pinto spotting pattern of large white and dark patches, usually bay (a reddish colour with a black mane and tail) and white. This colouring is also comm ...
Pigmentation
*
Albinism
Albinism is the congenital absence of melanin in an animal or plant resulting in white hair, feathers, scales and skin and reddish pink or blue eyes. Individuals with the condition are referred to as albinos.
Varied use and interpretation of ...
*
Amelanism
Amelanism (also known as amelanosis) is a pigmentation abnormality characterized by the lack of pigments called melanins, commonly associated with a genetic loss of tyrosinase function. Amelanism can affect fish, amphibians, reptiles, birds, and ...
*
Dyschromia
Dyschromia refers to an alteration of the color of the skin or nails.
Hyperchromia can refer to hyperpigmentation, and hypochromia can refer to hypopigmentation.
Dyschromatoses involve both hyperpigmented and hypopigmented macules.
__TOC__
See a ...
*
Erythrism
Erythrism or erythrochroism refers to an unusual reddish pigmentation of an animal's hair
Hair is a protein filament that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals.
The human body, ap ...
*
Heterochromia iridum
Heterochromia is a variation in coloration most often used to describe color differences of the iris, but can also be applied to color variation of hair or skin. Heterochromia is determined by the production, delivery, and concentration of mela ...
*
Leucism
Leucism () is a wide variety of conditions that result in partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. It is occasionally spelled ''le ...
*
Melanism
Melanism is the congenital excess of melanin in an organism resulting in dark pigment.
Pseudomelanism, also called abundism, is another variant of pigmentation, identifiable by dark spots or enlarged stripes, which cover a large part of the bod ...
*
Piebaldism
Piebaldism refers to the absence of mature melanin-forming cells (melanocytes) in certain areas of the skin and hair. It is a rare autosomal dominant disorder of melanocyte development.James, William; Berger, Timothy; Elston, Dirk (2005). ''Andrews ...
*
Skewbald
Skewbald is a colour pattern of horses. A skewbald horse has a coat made up of white patches on a non-black base coat, such as chestnut, bay, or any colour besides black coat. Skewbald horses which are bay and white (bay is a reddish-brown col ...
*
Vitiligo
Vitiligo (, ) is a chronic autoimmune disorder that causes patches of skin to lose pigment or color. The cause of vitiligo is unknown, but it may be related to immune system changes, genetic factors, stress, or sun exposure, and susceptibili ...
*
Xanthochromism
Xanthochromism (also called xanthochroism or xanthism), from the Greek ''xanthos'' (ξανθός) "yellow" and ''chroma'' (χρώμα) "color", is an unusually yellow pigmentation in an animal. It is often associated with the lack of usual red pi ...
References
Sources
*
*
** Chapter 146, "Introduction to Hypopigmentation"
** Chapter 147, "Albinism"
** Chapter 148, "Piebaldism"
** Chapter 149, "Vitiligo"
*
External links
* (extremely rare wild piebald moose photographed in northwest
Alberta
Alberta is a Provinces and territories of Canada, province in Canada. It is a part of Western Canada and is one of the three Canadian Prairies, prairie provinces. Alberta is bordered by British Columbia to its west, Saskatchewan to its east, t ...
, Canada)
{{Equine coat colors
Animal coat colors
Bird colours
Cat coat types
Disturbances of pigmentation
Dog anatomy
Horse coat colors