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The size of the patches can vary from a fine speckled pattern to large areas of color. Typically, the more white a cat has, the more solid the patches of color. Dilution genes may modify the coloring, lightening the fur to a mix of cream and blue, lilac or fawn; the markings on tortoiseshell cats are usually asymmetrical .
It is a mathematical problem that involves a hexagonal lattice, like the hexagonal pattern on some tortoises' shells, to the (N) vertices of which must be assigned integers (from 1 to N) in such a way that the sum of all integers at the vertices of each hexagon is the same. [1]
This "star" pattern is more finely detailed and intricate than the normal pattern of other star-patterned tortoise species, such as Geochelone elegans of India. The radiated tortoise is also larger than G. elegans, and the scutes of the carapace are smooth, and not raised up into a bumpy, pyramidal shape as is commonly seen in the latter species.
The patterns are arranged in ray-like markings and help the tortoise blend in with its environment. From a birds eye view the shell has geometrical symbols on it thus giving it its name. This tortoise is very small, and a full grown tortoise can only reach about 13–15 centimetres (5.1–5.9 in) in diameter.
Tortoiseshell was widely used from ancient times in the North and in Asia, until the trade was banned in 2014. It was used, normally in thin slices or pieces, in the manufacture of a wide variety of items such as combs, small boxes and frames, inlays in furniture (known as Boulle work carried out by André-Charles Boulle), and other items: frames for spectacles, guitar picks and knitting needles.
Crombie often saw the birds form patterns and abstract shapes, their varying densities appearing like the subtle gradations of paint strokes. The photographer became convinced that, with enough ...
Tortoises are generally considered to be strict herbivores, feeding on grasses, weeds, leafy greens, flowers, and some fruits. However, hunting and eating of birds has been observed on occasion. [29] Pet tortoises typically require diets based on wild grasses, weeds, leafy greens and certain flowers.
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