The European Night Crawler (Eisenia Hortnesis ) is the larger cousin of the Red Wiggler. They are better known as bait worms. Like their smaller cousins they eat everything that can be composted. They can grow up to 4-6″ long and as thick as a #2 pencil. They breed quickly and double in population every 3 months. Their temperature tolerance is a bit wider than their cousins. Their range is 25°F to 85°F degrees. People have ice fished with them and they can survive the frigid waters. There are 500 worms to the pound.