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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.
Diurnality, plant or animal behavior characterized by activity during the day and sleeping at night. Cathemeral, a classification of organisms with sporadic and random intervals of activity during the day or night. Matutinal, a classification of organisms that are only or primarily active in the pre-dawn hours or early night.
Oude Rode Ogen ("Old Red Eyes") or the "Beast of Flanders" was a spirit reported in Mechelen, Belgium in the 18th century who would take the form of a large black dog with fiery red eyes. In Wallonia , the southern region of Belgium, folktales mentioned the Tchén al tchinne ("Chained Hound" in Walloon ), a hellish dog bound with a long chain ...
The wildlife photographer embarks on night safaris to seek out Hong Kong’s nocturnal animals.
Animal reflectors or animal mirrors are important to the survival of many kinds of animal, and, in some cases, have been mimicked by engineers developing photonic crystals. Examples are the scales of silvery fish, and the tapetum lucidum that causes the eyeshine of dogs and cats. All these reflectors work by interference of light in multilayer ...
Night monkeys have large brown eyes; the size improves their nocturnal vision increasing their ability to be active at night. They are sometimes said to lack a tapetum lucidum, the reflective layer behind the retina possessed by many nocturnal animals. [8] Other sources say they have a tapetum lucidum composed of collagen fibrils. [9]
Brood XIX cicadas are periodical cicadas, appearing as adults as black with red eyes and orange veins within their wings. Lengthwise, they are only around 1.5 inches.
Red-eyed tree frog embryos use natural day and night light cycles as a signal for when to hatch, and tend to hatch just after nightfall. [27] Red-eyed tree frog eggs may hatch early (exhibiting phenotypic plasticity) when a change in the environment signals a danger to their survival. [28] Dragonflies, fish, and water beetles prey on the tadpoles.