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The dark blue, teal, and gold tapetum lucidum from the eye of a cow Retina of a mongrel dog with strong tapetal reflex. The tapetum lucidum (Latin for 'bright tapestry, coverlet'; / t ə ˈ p iː t əm ˈ l uː s ɪ d əm / tə-PEE-təm LOO-sih-dəm; pl.: tapeta lucida) [1] is a layer of tissue in the eye of many vertebrates and some other animals.
The original Martin scale, summarized below, consists of 16 colors (from light blue to dark brown-black) that correspond to the different eye colors observed in nature due to the amount of melanin in the iris. The numbering is reversed in order to match the Martin–Schultz scale, which is still used in biological anthropology. In this case ...
[1] Originally bred in the Trøndelag region of Norway, from where the sheep derives its name, the Grey Troender are most commonly varying shades of grey in color with distinctive white "tear drop" markings under the eyes. [2] However, black, brown and white woolled Grey Troenders occasionally do occur. [2]
#1 Zebra's Eye #2 Lion's Eye #3 Eye Of The Tiger #4 Eyes Of The Orangutan #5 Elephant's Eye #6 Eland's Eye #7 Kangaroo's Eye #8 Rabbit's Eye #9 Sheep's Eye #10 Hippo's Eye #11 Pony's Eye. Show ...
Another trait unique to domestic sheep as compared to wild ovines is their wide variation in color. Wild sheep are largely variations of brown hues, and variation within species is extremely limited. Colors of domestic sheep range from pure white to dark chocolate brown, and even spotted or piebald.
The scale consists of 20 colors [1] (from light blue to dark brown-black) that correspond to the different eye colors observed in nature due to the amount of melanin in the iris (in this case, the lower the number, the lighter the eye color): [2] [3] 1-2: blue iris (1a, 1b, 1c, 2a : light blue iris - 2b: darker blue iris) 3: blue-gray iris
This small flock of Navajo-Churros shows a common variety of colors. Churros come in a variety of colors, including reds, browns, black, white, and mixes, and color may change with age. The color is separated into the fleece color and the points color (legs and head). The sheep may also have different color patterns, such as eye patches and hip ...
Caprids (dwarf antelope, such as the sheep, goats, muskox, serows, gorals, and several similar species) use their preorbital glands to establish social rank. For example, when competition arises between two grazing sheep (Ovis aries), they have been observed to nuzzle each other's preorbital glands. By sending and receiving olfactory cues, this ...