Growing to a maximum overall length of 12 cm ( 4. 7 in ), the Mexican tetra is of typical characin shape, with unremarkable, drab coloration.

Males and females are identical in plumage coloration, but sexual dimorphism is evident in the species in that females are 25 percent larger than males.

Camouflage is not the only form of animal coloration that helps animals to survive or creates striking natural patterns.

Solid black and solid chocolate dachshunds occur, and even though dogs with such coloration are often considered handsome, the colors are nonstandard, that is, the dogs are frowned upon in the conformation ring in the US and Canada.

Green coloration is often due to serpentine resulting from originally high magnesium limestone or dolostone with silica impurities.

Since neodymium coloration depends upon " forbidden " f-f transitions deep within the atom, there is relatively little influence on the color from the chemical environment, so the color is impervious to the thermal history of the glass.

The fruit is gold, with red coloration.

The brown coloration is due to the NOx in the photochemical smog.

Their fur is long and silky, with coloration varying by species from yellowish-white to black brown.

Scales are usually pigmented, but some types of scales are metallic, or iridescent, without pigments ; because the thickness of the platelets is on the same order as the wavelength of visible light the plates lead to structural coloration and iridescence through the physical phenomenon described as thin-film optics.

The only finch in its subfamily that undergoes a complete molt, the American Goldfinch displays sexual dimorphism in its coloration ; the male is a vibrant yellow in the summer and an olive color during the winter months, while the female is a dull yellow-brown shade which brightens only slightly during the summer.

The sexual dimorphism displayed in plumage coloration is especially pronounced after the spring molt, when the bright color of the male's summer plumage is needed to attract a mate.

It therefore appears that the jaguar melanism gene is also dominant over normal lion coloration ( the black jaguar sire was presumably carrying the black on only one allele ).

When Clark vanishes and even the corporation is unable to find him, Tom reveals that he is on a secret diplomatic mission, and the children have been his protective coloration — instead of an accredited representative to a vital conference on Luna, Tom appears to be a doddering uncle escorting two young people on a tour of the solar system.

Trout in, or newly returned from the sea, can look very silvery, while the same fish living in a small stream or in an alpine lake could have pronounced markings and more vivid coloration ; it is also possible that in some species this signifies that they are ready to mate.

The coloration of butterfly wings is created by minute scales.

This structural coloration is the result of coherent scattering of light by the photonic crystal nature of the scales.

Sexual dimorphism in coloration and appearance is widespread in butterflies.

In the wet-season, these brown butterflies cannot as easily rely on cryptic coloration for protection because the background vegetation is green.

Cryptic coloration is found in many butterflies.

The structural coloration of butterflies is inspiring nanotechnology research to produce paints that do not use toxic pigments and in the development of new display technologies.

Adult coloration is brown to blue on the back and top of the head, lighter to silvery white on the sides, and white on the ventral surface ; speckling is fine, sparse, and restricted to the back.

The contemporary use of the term chest voice often refers to a specific kind of vocal coloration or vocal timbre.

Its specific epithet rubiginosa related to the rusty coloration of the undersides of the leaves.

Zooxanthellae give coral its coloration, with the specific color depending on the particular clade.

Vomeronasal analysis of chemical cues and recognition of sex specific visual stimuli, including tail and body coloration, aid in the identification of gender.

UCR is also recommended for some specific paper stocks, depending on the coloration and texture of the paper.

Near the southern border, cattle of the early longhorn breed whose coloration was black with a lineback, with white speckles frequently appearin' on the sides and belly, were called `` zorrillas ''.

Koi are domesticated common carp ( Cyprinus carpio ) that are selected or culled for color ; they are not a different species, and will revert to the original coloration within a few generations if allowed to breed freely.

Some desert region cheetahs are unusually pale ; probably they are better-camouflaged and therefore better hunters and more likely to breed and pass on their paler coloration.

Regardless of breed, any cat with solid gray coloration has two pairs of double-recessive genes for the non-agouti and color-dilution traits, and so an exclusive mating between two solid gray cats should always produce solid gray kittens.

The Himalayan cat is a breed of long-haired cat identical in type to the Persian, with the exception of its blue eyes and its point coloration, which were derived from the crossing of the Persian with the Siamese.

It was for the color that the breed was named Himalayan: a reference to the coloration of Himalayan animals, in particular the Himalayan rabbit.

The Balinese is breed of domestic cat with long hair and Siamese-style point coloration.

These birds are permanent residents, and unlike the migratory orioles that breed in the US, the species is " sexually monomorphic " -- both the males and the females have elaborate coloration and patterning.

The breed was selectively bred over many years for desirable traits, such as large size, gentle demeanor, and a tendency to go limp when picked up, as well as the striking pointed coloration.

Koi are domesticated common carp ( Cyprinus carpio ) that are selected or culled for color ; they are not a different species, and will revert to the original coloration within a few generations if allowed to breed freely.

Any horse breed may have point coloration with the exception of a very small number of horse breeds where humans have specifically used selective breeding to eliminate coloring produced by the agouti gene.

Pinto coloration is not allowed, nor is ancestry from a breed noted for pinto coloring, such as the American Paint Horse.

As evidenced by Arnold's erect ears and all white coloration, he was of the American Yorkshire breed.

Dilution-factor coloration, such as buckskin and palomino, also occurs frequently, owing largely to Morgan influence, as dilution-factor genes do not occur in the Arabian breed.

There is no proof of the German Shepherd bloodline for London and so there is speculation that another breed could have been mixed in as that particular brown and white sable with reverse mask coloration is achieved in mixed dog breeds such as the Tamaskan Dog, Northern Inuit and Utonagan.

Although pinto coloration is rare in the wild, people have always had an eye for animals of unusual colors and a desire to deliberately breed for them.

The original coloration of this breed was very similar to the Himalayan rabbit, with a predominantly white body and a dark brown ( nearly black ) on the feet, nose, ears and tail.

Breeders have been able to make this coloration permanent, and a wide variety of hues breed true.