There are over 3000 species of earthworms in the world. Thus, living in a worm bin is not as confining to red worms as it would be to nightcrawlers. Red worms for worm composting can be purchased from worm farms. Composting worms are usually sold by the pound. Look for worms in garden soil, vacant lots, etc.
Research worms from around the world.
Many people mistakenly believe that garbage sent to landfills decomposes quickly, like it does in a worm bin or compost pile. However, this is not at all true because the key ingredients of air and moisture are missing in a landfill environment. Additionally, worms and other important decomposers can not live or function in such conditions. Put some worm food in an air tight bag. Compare what happens to this food to what happens to food in a worm bin.