Are Red Worms blind?
Red worms are born without eyes because nature decided there is no need. They do have a light sensor, as their skin is very sensitive. Bright light is a major irritant to the red worms. They will scurry about and bury deeper every time bright light appears. It is fascinating to observe anglers using a flashlight when searching for night crawlers since the light makes the night crawlers burrow deeper underground. However, red light draws much less sensitivity to the red worms. In a red light you can easily observe the behavior patterns without disturbing the red worms. A sheet of red cellophane buffering light from the red worms makes it possible to observe them.
