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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.
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]
Sisyrinchium idahoense, the Idaho blue-eyed grass, [7] is a perennial that is native to western North America. It is not a true grass , but is instead in the family Iridaceae . [ 8 ]
The smell of freshly cut grass is evident immediately after mechanical damage, such as that done by mowing the lawn. The main compound responsible for the smell of freshly cut grass is cis-3-hexenal. It has a low odour detection threshold that humans can perceive at concentrations as low as 0.25 parts per billion.
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.
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“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.
Omocestus viridulus are usually green all over, but some may have brown coloration on the sides. [2] In Scandinavia, they are usually green or light brown. [3] The males do not have any red coloring on the abdomen and possess a noticeably long ovipositor, characteristics that help distinguish it from the similar species O. rufipes and O. haemorrhoidalis.