Scintillating Scotoma. (Migraine Scotoma). A scotoma is a âblind spotâ in front of the vision. The visual phenomenon of scintillating scotoma usually appears like a âtwinkling shadowâ or âzig zag patternâ before the eyes.While every experience is a little different, the most common symptoms are âblack spotâ or âtwinkling blurâ appearing before the eyes.he visual phenomenon of scintillating scotoma usually appears like a âtwinkling shadowâ or âzig zag patternâ before the eyes. While every experience is a little different, the most common symptoms are âblack spotâ or âtwinkling blurâ appearing before the eyes.
Cancel. Spiders live all over the world, including trees, dry areas, wet areas, under ground and in the oceans. Discover the different varieties of spiders on the earth with information from a science teacher in this free video on spider habitats.ancel. Spiders live all over the world, including trees, dry areas, wet areas, under ground and in the oceans. Discover the different varieties of spiders on the earth with information from a science teacher in this free video on spider habitats.
Jumping spiders are not the only spiders family that mimic ants also Clubionidae (sac spiders) in the genera Castianeira and Apochinomma imitate ants. Five genera of ant-mimicking spider occur in Australia: Judalana, Ligonipes, Rhombonotus, Damoetas and Myrmarachne. The jumping spider can be found everywhere if the sun is shining, on trees, grass and rocks. At night or during rainfall the spiders hide in a dry spot under a small web. Their large eyes give them excellent eyesight. As most spiders they also have four pairs of eyes.