Spider veins are tiny, thin veins that can be seen very close to the skinâs surface. They look like red, blue, or green spider webs just beneath the skin. Sometimes they are also described as looking like marble. Spider veins are caused by a backup of blood. These become nonfunctional, âdead-endâ veins.
While the fairy fly is the worldâs smallest insect, there a few runners up! For example, the feather wing beetle is only .25 millimeters long. Some scientists think these beetles may even be smaller than fairy flies, but for now, the fairy fly is considered by many to be the âsmallest insect!â.
Confidence votes 12.6K. The world's largest butterfly is the 'Queen Alexandra's Birdwing' of New Guinea with a wingspan of 12 1/2 inches or 32 cm. The world's smallest butterfly is the 'Western Pygmy Blue' of the southern US with a wingspan of 0.62 inches or 15 mm.he world's smallest butterfly is the 'Western Pygmy Blue' of the southern US with a wingspan of 0.62 inches or 15 mm.