Eudrilus eugeniae is a species of earthworm native to tropical west Africa and now widespread in warm regions, both wild and under vermiculture, also called the african night crawler. The West-African nightcrawler grows well at a temperature of 24-30°C (75-86°F).
Video: How to harvest worm castings from African night crawlers, including a sifter:
African Night Crawlers Are Hungry Little Guys: Harvesting Some Worm Castings! - YouTube http://buff.ly/1jtIqjN