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When in breeding condition, the males' eyes turn red. After the female lays her eggs, the male fertilizes the eggs and aggressively defends the nest, eggs and fry from any intruder-including other females. Males are most commonly found defending the nest for up to five days later until the fry have hatched. [10]
Similar effects, some related to red-eye effect, are of several kinds: In many flash photographs, even those without perceptible red-eye effect, the tapetum lucidum of many animals' pupils creates an "eyeshine" effect. Although eyeshine is an unrelated phenomenon, animals with blue eyes may display the red-eye effect in addition to it.
Sisyrinchium is a large genus of annual to perennial flowering plants in the family Iridaceae.Native to the New World, the species are known as blue-eyed grasses. Although they are not true grasses (Poaceae), they are monocots.
The irises of human eyes exhibit a wide spectrum of colours. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3]: 9
A red milkweed beetle cutting milkweed vein to reduce/stop latex pressure before feeding beyond the cut. When startled, the beetles make a shrill noise, while they make a 'purring' noise when interacting with another beetle. [6] The red and black coloring are aposematic, advertising the beetles' inedibility. Red milkweed beetles lay egg ...
“Cherry eye is a common eye condition in dogs where a gland in the third eyelid pops out and swells up, making it look like a red, swollen ‘cherry’ in the corner of the eye,” says Dr. Hood.
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The adult Indian muntjac (Muntiacus muntjac) is a solitary animal, other than during the rut (mating season) and for the first six months after giving birth. Adult males in particular are widely separated. Marking grass and bushes with secretions from their preorbital glands appears to be involved in the acquisition and maintenance of territory ...